Injured. Continue or go home?

Hope this helps...
http://www.aofas.org/footcaremd/how-to/foot-injury/pages/how%20to%20care%20for%20a%20sprained%20ankle.aspx

Continue!! But, Mostar will be tricky hobbling. The old area is paved attractively with smooth river rocks in patterns that are set up on their edges. Maybe by Dubrovnik you will be able to walk slowly... I had a bad sprain on the first day of a vacation once - that night, I could not bear weight on the leg, but by the next morning I could slowly walk. I did that whole trip in the one pair of soft shoes that would go on that swollen foot. It can be done, but you will need to slow down a lot.

You should be fine to continue - you may need to skip a thing or two. Just be sure to not over do it and follow the Dr's orders as far as rest, elevation & icing. Watch out for swelling.

We'd probably add more Dr. ordered beer & wine stops!

You had earlier mentioned traveling by car and I think that makes the "stay" decision easier than if you were using all public transport. At Plitvice, you can see part of the scenery using only bus and boat connections (but the walk downhill from entrance #2 down to boat dock P1 is described as steep).

Depends on the severity of the sprain. Steph Curry (Golden State Warriors) missed two games against the Rockets after a sprain, then slipped and injured his knee slipping on a wet floor. As others mentioned, the protocol is RICE: Rest + Ice + Compression + Elevation. A little hard to get rest and elevation touring around on foot.

My sympathies to you. I tore a hamstring at the start of 10 days in Italy. Hobbled around and watched a lot of Italian soccer/football on the hotel TV.

http://www.mayoclinic.org/diseases-conditions/sprained-ankle/basics/definition/con-20032428

Treatment for a sprained ankle depends on the severity of the injury.
Although self-care measures and over-the-counter pain medications may
be all you need, a medical evaluation might be necessary to reveal how
badly you've sprained your ankle and to put you on the path to
recovery.

http://www.mayoclinic.org/diseases-conditions/sprained-ankle/basics/lifestyle-home-remedies/con-20032428

For immediate self-care of an ankle sprain, try the R.I.C.E. approach:

Rest. Avoid activities that cause pain, swelling or discomfort.

Ice. Use an ice pack or slush bath immediately for 15 to 20 minutes
and repeat every two to three hours while you're awake. If you have
vascular disease, diabetes or decreased sensation, talk with your
doctor before applying ice.

Compression. To help stop swelling, compress the ankle with an elastic
bandage until the swelling stops. Don't hinder circulation by wrapping
too tightly. Begin wrapping at the end farthest from your heart.

Elevation. To reduce swelling, elevate your ankle above the level of
your heart, especially at night. Gravity helps reduce swelling by
draining excess fluid.

http://www.mayoclinic.org/diseases-conditions/sprained-ankle/basics/treatment/con-20032428

Treatment for a sprained ankle depends on the severity of your injury.
Many people simply treat their injuries at home.

Medications

In most cases, over-the-counter pain relievers — such as ibuprofen
(Advil, Motrin IB, others), naproxen (Aleve, others) or acetaminophen
(Tylenol, others) — are enough to manage the pain of a sprained ankle.

Devices

Because walking with a sprained ankle might be painful, you may need
to use crutches until the pain subsides. Your doctor might also
recommend that you use a removable plastic device such as a splint.

Don't hold back on asking for wheelchair assistance at the airport. They will speed you and you carry-on through check points.

That happened to me last year; the bigger problem was that I kept reinjuring the ankle when I stumbled on unnoticed pavement irregularities. Take things as slowly as you can, and consider using a cane or a walking stick in the short run.

Plitvice is going to be a challenge. Not only may there be crowds on the walkways, but there are almost never any handrails. There's no danger involved, since you are rarely more than one or two feet above the (very shallow) water, but you may not feel totally stable because of the recent injury. With my pain-free but untrustworthy ankle, I was very uncomfortable without anything to hold onto when the walkways were just wide enough for two people to pass each other. Do everything you can to start your day there very early so at least the crowding won't be such an issue. Try not to carry anything with you.

Ljubljana's historic district is relatively flat. If your ankle is still bothering you when you reach Ljubljana--which seems unlikely if you don't re-injure it--I suggest you skip the castle unless you have a burning desire to see it. I'm nearly certain there were stairs.

The path around Lake Bled is (as you would expect) pretty flat, so I think that will be OK even if you're not back to 100% at that point. Try to get dropped off very close to lake level. The town itself is a bit higher than the lake.

Rovinj's historic district has uneven pavement and is most definitely not flat. You'll need to be careful there; I don't think the historic area is fully taxi-accessible, though there's a flat area at the waterfront.

The historic part of Zagreb is distinctly uphill. There's even a little funicular, but it is not adequate if you are mobility-challenged. I suggest taxis, which are readily available and can get you where you want to go. There are some large museums down in the flat part of town, and they have elevators. I'm not sure about the elevator situation in the small museums in the upper town. The Museum of Naive Art, for example, is not on the ground floor.

We did the RS Adriatic tour a couple of years ago. A lady in our group had taken a spill a day before the tour started and ended up with a fractured right hand and fractured foot. She had these treated at the hospital in Lubljana and had a plaster cast on both the foot and the hand. She debated about whether or not to continue with the tour. Because her hand was broken, crutches were out of the question. She had a wonderful husband who assisted her with bathing, etc. and offering his arm when walking. She opted out of Plitvice as it was too much walking and she had been there before anyway. Other than that she made it to almost all of the tour activities. We made it a point to find her a place to sit when the tour guide stopped during the walking tours. She was an amazing trooper.

Thanks everyone for all the great advice. I spent a good portion of the first day after my injury doing the RICE treatment. We drove here to Mostar today and my great husband is going out now to scope out a good "Doctor ordered " spot to people watch and drink cold beverages! I hope to feel much better by Plitvice because it was high on my to do list. Also going slow is mandatory. I literally have to watch every step because I'm not lifting my foot high and even small unevenness can trip me up. I thank everyone again. I will go on!!