Face fucking

So my husband likes to face fuck me when I give him head. He’s very good at listening to me when I tell him no more or be easier. Anyways he’s VERY dominant. Like he’ll slap me in the face pull my hair choke me etc.... but yesterday he made a comment about how he wants to face fuck me with no respect or remorse to me or my feelings. Like I told him we can try but if I pull back and say stop he has to stop. He agreed. It makes me nervous because I’ve already accidentally thrown up once when he did that. He didn’t mind I rinsed my mouth out and kept going and he liked that.... so I agreed to try it again. But I’m a little hesitant. He gave me a confidence boost the other day and told me I suck dick like a porn star and he likes how messy and gross I make it 😂 should I be nervous? We have save words and “touches” that me NO MORE. And as long as he follows those I should be okay right??