Hey! First off, ehelp is for anything where you want to get the advice of support leaders. Your problem is totally at home here.
If you're worried about the pimples, then see a doctor. If they hurt, like you said they do, then things clearly aren't as they should be.
You could also try looking up your symptoms in google (I'd try for you, but it's difficult with such a vague description), but do be warned that it's very easy to diagnose yourself with all sorts of horrible illnesses and be completely wrong about all of them. Think of simple things before the complicated ones!
Hope that helped. Take care.
-Fern