Painful sex

I’m 21 weeks today and I wanna say for the past 2ish weeks sex is so painful. To the point I’m in tears and I don’t want it at all. My husband is starting to be an ass about and we’ve been fighting the past few days because of it. I feel like a knife stabbing in my stomach during but am fine after and baby is fine. I am type 2 diabetic so idk if that could have something to do with it. Help please!!!