I feel like crying...

My fiancé can never just lay down with me and relax for a few minutes... it always has to end in sex and if it doesn’t he gets mad and starts to ignore me. I’m 19 weeks and almost 6 days...I just feel like all I am is a sex toy to him anymore. If we fight, the only way we can make up is through sex. It’s always sex sex sex. And if I don’t give it to him cuz I’m tired or crampy or just don’t feel good he gets angry or upset and just ignores me because he’s horny and can’t get off. But I don’t want to tell him that it makes me sad because then he’ll just say I am just trying to compare him to my abusive ex which I’m not...😢