crying while masterbating

so my boyfriend and I don't have alot of sex. I'm pregnant, we're never on the same schedule or mind set, fighting, company over. it's just horrible right now. he's been making extremely offensive comments about me sexually lately and I'm sure it's his way of trying to make me want to prove him wrong in bed but No that's not working and it pushes me away more... any ways... I have taken it upon myself to masturbate when he's asleep. I go to our living room and just do it. but I always start crying my eyes out like a fucking idiot and it kills my mood.. Idk if im just so stressed and it helps enough to cry or wtf is going on. is this normal!? am I insane!?