A few months ago, right after my girlfriend and I had sex, she started having very intense stomach pains that she described like really severe menstrual cramps. I was scared for her but thought it was a one time thing. When it started happening again, she went to the doctor, who told her that her uterus is slightly tilted, and that I'm hitting it during sex. The worst pain for her seems to happen after I'm laying down with her ontop facing me and rocking back and forth, but lately it's been happening in almost all positions we try. Does anyone have a suggestion for positions that help this from experience?