sex isnt that big of a deal apparently

my husband has been acting weird for like a month and it kinda got to me. like his video game time doubled and he wasnt picking up after himself like usual, and there has been a lot of changes in our family recently, so I thought this was his way of taking time to cope. he didnt seem to want to talk about it, so I backed off. we havent had sex in almost a month, and he hasn't been paying much attention to me, if any. but he came back from work like 2 days ago and he seemed like he was back to himself. so last night i made moves on him, and he was up and then he said no. he doesnt want to. and I was like why? and he just said he doesnt want to. hes worried about the baby. and I was like you know the baby isnt going to get hurt right? and he said yeah. I said and you know he doesnt know whats going on? and he said yeah. but this is my fourth attempt in like a month and he keeps turning them down for different reasons even when he has a boner. hes too tired, his shoulder hurts, he has a headache, he has things to do tomorrow? . like bullshit reasons. so I asked last night if hes scared of the baby, then that means we aren't going to have sex for the next 6 months? (4 to go and 2 after) and he said yeah.

a little background. im 24 weeks this week(little over 5 months) and we just got married like two months ago.

anybody have any idea what I should do or what his problem is? ive been crying all night and I slept on the couch. im 19 and newly wed and my husband doesnt want anything to do with me anymore and/or doesnt find me attractive. 😭