(TMI warning) pain in upper right side belly

Sammie • Hubby and I are expecting our first miracle! Avonlea Janine on 8-8-15!! So excited!
I'm 38 weeks pregnant and after intimacy with my husband I've been having horrible upper right side belly pain. It started hurting towards the end of our intimacy and after laying down its still painful. Did we hurt something?! Anyone else experience something like this?