So, now the issue is packing. Here's some techniques that will help:
If you've packed any items as unique outfit(s) - take them out and put them away. Every item needs to mix and match multiple ways to be worth packing. My mom is a heavy packer and starts by her mapping out her itinerary and deciding what outfits she'll need, at least two outfits per day.
Pick items that give you lots of flexibility to dress nicer, dress more casually, layer if needed or worn as the only layer.
Don't buy all new, or specialty, clothes. Bring clothes you know fit well, are comfortable and ones you'd like to be wearing when getting your picture taken. The clothes you wear most often are usually the best. One lady I used to work with always packed the contents of her laundry basket, then did her laundry right when she arrived. She figured those were the clothes she wore regularly.
(This is RS advice) Any item packed because you "might" need it needs to be taken out and put away. Only bring it if it will be used regularly enough to justify lugging it around.
Four bottoms and five tops that all mix and match make 20 outfits. On a 21 day trip you rarely have to wear the same thing twice. When you get back, you can hide the clothes you packed for a few months - you'll be sick of them.
Lay everything out and keep asking yourself what you can do without. If you end up really missing something, you can buy it there.