Lol I've been married for 20 years and PREGO with our 5th child, thank God, I have all kinds of insecurities and have accused him of several things that I know in my heart he wouldn't do to me. It's ALL THE HORMONES! try your best to keep it under control and let him know this is your body telling your mind you need more attention. Works for us...
I'm having the same issue I'm really crazy and hormonal I scream at him all day and then at night I expect sex truthfully I think it's pretty normal he's scared your scared it's uncomfortable it's awkward if he's never given you a reason you should be grateful that he's there for you I know it's hard to just except but as a hormonal pregnant women we overthink everything when you feel the urge to argue with him you should just do some stretches or exercises and something to distract you I have started walking alone mostly so I can think things over to myself