Wtf really

So ima start by saying I’m 4 month pregnant and always tired. Well I’ve been with my husband almost 7 years just got married. Last night laying in bed he hinted around that he wanted to have sex and I told him not tonight cause he has bad back problems and plus I was tired. This man said to me well I ain’t dead yet and that it was a shitty marriage because I wouldn’t have sex with him I mean honestly. Wtf am I supposed to feel bout this. Which after I had both my kids he’s talked to other women. And would of slept with the last one but I found out before he could and I was dumb and forgave him but I don’t think I can if he does it again what do u lady’s think