So unhappy with my body

I’m 3 weeks pp, and I’m so unhappy with the way I look. I’m back to my heaviest weight -205lbs. My arms and thighs are so big. It’s not even my stomach that bothers me so much it’s my arms and the lower half of my body. My knees are fat I don’t even wanna wear a dress and it’s almost 100 degrees here. I look like such an idiot wearing long sleeve clothes with this heat.

I just want my confidence back 😞😢💔

Any tips would help. I want to start working out, maybe lift some weights to tone my arms but I still have minor pelvic pain. I just want to go back to my pre-pregnancy weight of 180lbs, it feels impossible 😢