Alright, we need to know if the pain is in your upper or lower stomach, and if your partner is (to be polite) above average in size. It is possible that he is hitting your cervix in some positions, and that hurts in the lower stomach. If you are having 'hard' orgasms during intercourse, this could cause cramping in your upper stomach. I don't have any other ideas. Others here will probably be able to add more. Blessings - Blu
It's like the middle of my stomach. My partner is average size. I've had others that were smaller than my partner and it will still give me pain. It's only on certain positions. Thank u.