Is it normal to be in pain?

hey, im a short petite girl (5'0' around 115 lbs) and my boyfriend is a tall guy (around 5'7')
so, im a lot smaller than he is. my question is, after having sex, could it be normal to have like cramps that feel like they are in your lower stomach? my boyfriend is about 7 1/2-8 inches long average, so I think it could be because he is so much bigger than me proportionally, but then again im not very sure.. please give me your advice. thanks so much!

If you have having pain in you back rather than your genitals, and after sex but not during, I'd suggest trying a different bed or position. Move around a lot too, to improve circulation. I had cramps in my legs that would keep me awake at night half the night for 5 YEARS at least, till I realized it was pinched nerves and muscles from bad furniture. If the problem persist check with your doctor. Mine suggested posture and that fixed it all, total cost, $60 bucks for the visit and $200. Start cheaply.

I'm a nurse and it sounds like you might have a problem. Cramps in the lower abdomen can indicate ovarian cysts(most are harmless) or something else. Try having very lubricated sex. If you continue to have sharp pain, go see a doctor. Even if nothing is wrong. Better to be safe than sorry!!