>>1
Go see a doctor. Now.

Jeez. No matter how much you search, you will never have the expertise of a real doctor. You might mistake it for something, treating it for your perceived problem, and it then turning out to be something completely else, say cancer or whatnot :-p

This is a matter of health, you're going to have to swallow your "pride" (not that I can grasp why you seemingly feel ashamed about this) and tell your parents. Unless they're crazy fundies who are going to say that it's god punishing you for not worshipping him harder. If so, then go visit a doctor without them :-p