super sad and insecure rn.

so I have suffered from body acne and face acne for a while now. I barely have some on my face but I used to have a lot of it. now I only have a lot on my back, some on my shoulders, and chest. I also have stretch marks on my but and some on my thighs, one on each knee and my cousin recently discovered that I have stretch marks on my back. 😩 why? why and how did I even get some on my back? I haven't gained weight. I'm 5'2 and 105lbs. I'm just so insecure about myself right now. I can't wear. short sleeves or shirts that show my chest too much. etc. it sucks!!! especially when you're a girly girl that would like to wear tank tops and crop tops and all of that. I can't even wear spaghetti shirts. 😩