24 weeks and I had sex with my fiancé this morning. Ever since then I’ve been experiencing my tummy tighten every time i stand and walk around. It’s like a hard ball then releases and happens again sporadically. I also worked a fundraiser yesterday which had me sore already. Not sure if I should go get checked out. Baby is kicking. Don’t remember this with my first. Not sure if this is Braxton Hicks but it really hurts.