Maybe an off the wall question, but does it hurt more when you go to the bathroom? I had symptoms like this looooong ago and it turned out I had a bladder infection. Maybe after touching yourself for such an extended period of time (nothing wrong with that!), you introduced some bacteria into the tube connected to your bladder.

You will have to bite the bullet and go to the doctor. I think it'd be fine to wait a day and see if things get better. If not, then go.