sex at 39 weeks and cramps

monserrat 🌺 • #27 mommy to 1 princess 👸🏼 1 prince 🫅🏻married 👨‍👩‍👧
 so me and my husband had sex and after 30 or 50 minutes i started to have like period cramps and they dont go away and i  also feel like my hips are crushing it's painful and uncomfortable I can't sleep because of that 
 as a FTM everything seems like something not normal to me but i just wanted to know if anyones has experienced something like this is it normal?