Please help with my skin!

I have had a terrible itch all around my bum and my legs for about a month and a half now, and I’m not sure what it is but I concluded it was from fiberglass from an old mattress that was a gift to me and my bf but I could not visit a clinic or dermatologist. So I’ve been using coconut oil and I have used this cream I got from amazon for bum acne but I’ve used it to heal scars and scratches and it’s healed wonderfully before with a bandaid. But I took off my bandaid today and (I change them everyday) it looks like THIS. It’s terrible. I don’t know what’s wrong with my skin, I never had this happen before. I’ve never been so self conscious like this:( (also I’ve been sitting on a towel after showering that’s why my skin had lined and whatnot) all the dark spots and red spots are from a month and a half ago. There’s a before underneath

Sorry if it’s weird I’m showing my ass on here LOL but it’s a before and after. I don’t know what’s going on :-(