TMI TMI TMI TMI

But every time me and my baby daddy have sex, I feel my uterus bulging out and it’s so hard. Is my baby okay? I’m 13 weeks and 5 days. Is that normal to feel? Should I stop having sex? We don’t usually have rough sex. I’m always laying on my stomach but not put weight on it, we do doggy. I give it like 20 minutes until it goes back to normal and it’s not so hard anymore. Why does it do that?