He doesnt want to make me cum

So here's how our sex goes lately.

He will make me give him head for like, ever. I'm guessing up to a hour. It feels like forever. It's super uncomfortable giving head for that long and he won't let me stop for a break. My jaw locks up, neck hurts, mouth hurts, hair keeps getting my mouth, constantly gagging and eyes watering. Props to you if you can give head for that long but I can't. He's not the type of guy who cums through head. We've been together for two years, I've only ever made him cum through head 5 times and I'm pretty fucking talented at head. I'm the first girl to make him cum through head. But yeah, he makes me give him head for a long period of time and its uncomfortable. Then, he finally wants to fuck. Lately he only wants to fuck in 1 position ONLY. The only position that's super uncomfortable, painful, and not pleasurable at all for me. But super pleasurable for him. I'm 23 weeks pregnant and in this position I'm laying on my stomach legs closed and the fucks me from on top. If that makes since. I keep telling him it's painful and uncomfortable for me and we have to stop doing that position and he won't stop... So he cums, and then after that the sex is over. I'm left completely unsatisfied and pissed off cause I sucked his dick for so long and he gets to cum but I don't. He gets all the pleasure and I'm completely uncomfortable the whole time and don't get to cum. Only he does. He gets all of the pleasure. Gets head for like a hour, forces me to get in position that only feels good for him, and only he gets to cum. The only way I've been cumming is by me masterbating. No, I don't masturbate to porn. After he's came he's done, I only ever finger myself right next to him and cum. He won't even finger me to finish me off. I used to have to ask to make me cum, and when hes finally like ok fine I'm rushed to cum. He just gets started and he's like "are you close" a billion times and literally gets frustrated with me cause I want to cum too... He legit gets fucking aggravated and I feel so terrible for asking cause I know he hates it... Like why do I get treated this way? I don't rush you to cum and get pissed off just cause you want pleasure also... But now he just won't do anything for me at all anymore. I don't get to cum, I don't get any pleasure. I don't want sex anymore cause I know it's going to be awful for me and only great for him.

It's not hard for me to cum. I can ride him and cum in under a minute, same for oral. Just in the position he only ever wants now, it's painful for me and doesn't feel good what so ever. The whole time I'm focusing on trying to breathe cause I'm being fucked while laying on my stomach.

I just don't know how to talk to him about it. I feel like I'm not aloud to get upset about things.. I've told him he hasn't made me cum in about two months and he's like no I made you cum last night wtf. He lies to manipulate me into thinking oh maybe I did cum last night. But it's not true. When I cum, I cum hard and I scream. I don't remember the last time he's made me cum cause it's been so long. I've been masturbating the whole time.. That's the only way I get to cum. After he cums hes done with sex and lays down, and finger myself next to him till I cum. I don't masturbate to porn or do it without him in the same room. It's only always after sex. I used to always start things and always want sex but now I dread it. Cause I know I'm going to be left unsatisfied and just uncomfortable the whole time... It's really shitty. Our sex lives used to be so good but now he just cares about himself getting off not me... :/ I don't know what to do anymore...