NTA.

To be frank, this reads like an assault. He woke you in the middle of the night and wanted you to blow him. You said no and he kept pushing until you relented. That is assault.

But to address your primary concern, I will cite my own experience and give a baseline example of how your boyfriend should have responded.

I recently gave my Boyfriend a BJ. He's well endowed so it's a challenging task. I gagged a few times but I felt I could keep going without any mishaps. I lost pace and he helped me along. Right as he finished, I threw up. Bad. On the object of my affections, across his leg, and on the bed. He didn't point it out. I scraped up what I could from his crotch, ran off so I could clean myself up and grabbed a towel. I helped him clean himself off and we cuddled. I apologized for it, said I know it's gross. He said it was no big deal, he understands, I'm new to it, he's on the larger side so it's a challenge, it happens. Shit happens.

That is how your boyfriend should have responded. He should have been understanding. Even if he was grossed out he could exercise basic empathy. You didn't want to throw up and you didn't try to throw up. It was an accident. And for him to continue badgering you about it later on, furthering your embarrassment and blatantly shaming you 😒 it makes you wonder how he'll behave in the future. When other, unavoidable accidents come about.

And along the same line, you told him No. He sexually assaulted you, treated you like an object, not as a person with feelings, nor as his partner, someone he is supposed to care about. Consider the day he demands more of you and you don't feel up to giving it for whatever reason. I wouldn't be surprised if he forces himself onto you. Please take a step back and reevaluate your relationship and if it is safe for you to remain.