husband expects me to just get turned on when he is or something

so I’m 18 weeks along and I haven’t really wanted to have sex at all since I got pregnant. I’ve tried to communicate with my husband and tell him I love him, am still attracted to him etc. I’m just going through a lot of changes. I don’t feel sexy, I’m tired, my boobs hurt, sex is just not something I want or need right now. I do still try to have sex with him at least once a week to keep him satisfied but it doesn’t always happen for whatever reason.

so I’m sitting in the living room and he comes up to me a little bit ago and is like want to go have sex? and I said you can’t just expect me to turn it on whenever you want it.... we just got done eating dinner so it was bad timing, he’s not kissing up on me or making me feel wanted or turned on, he just expects me to get up and walk into our bedroom, lay down and let him do his business. he doesn’t seem to take how I feel into consideration and accuses me of getting mad at him for asking and took offense basically just because I wasn’t up for it.

now I feel bad like I’m in the wrong just because I don’t want to have sex. has anyone else gone through this with their SO? did you lose your sex drive while you were pregnant and how did you deal with it? I just need some adviceeeee, help