I have vaginal burning only to the touch, what could it be?

I've been having some vaginal burning. It used to be only if i had sex frequently, then it was if i had sex once a day, and now its burning even when i haven't had sex in a week! i dont have any weird or funky discharge or smell or anything like that. I do have a doctor appointment for a pap and everything, but i'm wondering if anyone has experienced this? its ONLY when i touch it, and if i pee right after sex it burns really bad as well. no weird bumps either. just painful to the touch. ):