Cramping after Orgasm?

Cheyenne • I an 27 and I have a 3 year old boy, 6 year old boy, a 7 year old little girl, and 16 month old little girl
So this is weird and tmi but since I got pregnant (I'm only 6 weeks) and DH fingers me or anything else and I have an orgasm I cramp up. Does this happen to anyone else? ( I have already been to the ER last week for some one sided pain and everything was fine so I don't think its hurting the baby)