BH? might be tmi

so anytime I am walking my stomach tightens up like I'm having contractions but it never lossens up again until I lay down for a while, then today me and my husband did the deed and the second I starting orgasming a horrible pain in my stomach (near my belly button) started and my stomach hardened up, it was so painful I couldn't move for 10 minutes, it's been about an hour now and it's still painful when I move but I don't feel any tightening or contractions. anyone else deal with this?