Cramping after orgasm

I cramp super hard after I orgasm. It's almost bad enough that I don't want to orgasm. I've never had this before except this month. I haven't tested for pregnancy yet as my cycles are super irregular but I'm hoping that the reason my boobs have been hurting for 3 weeks now is due to pregnancy. Usually they hurt for a week before my period but I'm going on 3 weeks of soreness now.

Anyway, does anyone else cramp after they orgasm?