I've been having sort of the similar pains. It doesn't hurt when I go to the bathroom, but it is enough to keep me awake for a few hours when I am trying to sleep. As embarrassing as it is to say this, I've only recently lost my virginity but now whenever I have sex, my lower abdomin hurts for like a week..
It's been making me worried and of coarse my luck, my doctor is booked for the next 3 weeks :S