OP I don't mean to scaremonger, but when my son was a baby, my ex had gone to bed and I needed help with something. I woke him up and he said he would headbutt me into silence, then tried to claim it was a joke.
I believed it was just a sleep deprived bad joke and he didn't mean it because he's never said such horrible things before. The next night, he choked me, stole my phone so I couldn't call the police and then threatened to kill us all.
He then denied remembering anything, said his mental health is in tatters, something must be wrong with him because he's no recollection of it etc.
I ended up leaving him, because the mask had slipped and no matter what he said it couldn't change what he had done. It really helped me when a friend I'd confided in asked the question "what do you think social services would say about that?"
I just want you to see this as a precautionary tale. Abuse often starts in pregnancy or shortly after, sometimes they wait until you've got multiple kids so you're well and truly trapped.
If you saw a therapist they would advise against couples therapy with someone who has shown abusive tendencies as they're often good at manipulating the situation, and you aren't responsible for changing him, but I 100% recommend getting therapy for yourself, women's aid might be able to point you in the right direction for that.
He will spin a yarn and tell you it was a joke in bad taste he's sorry, get over it, why do you never let it go, you're like a dog with a bone, all to escape accountability and blame you, but make no mistake he will escalate this if you don't put an end to it.