anyone else experience this?

Am
Tomorrow I'll be 8 weeks pregnant. And when ever I poop it hurts so freaking bad! I get the worst cramps with it. But only when I'm pooping. And it doesn't matter if I'm constipated or not. Diarrhea doesn't hurt but I rarely have that. I was told it's because I have a downward pointed vagina and that my uterus (now that it's starting to swell because of baby) is pushing up against my bowls.... anyone else experiencing this?