fiancé seems off

My fiancé and I are expecting our first baby in 2 weeks! Everything was amazing in the beginning and we were both so happy. The past couple months we’ve been bickering a lot more and not really seeing eye to eye on anything. We aren’t having sex anymore, due to early complications and almost having a miscarriage, but we are in the clear now and he is too scared. He won’t even let me do anything to him either. He works 7 days a week and just seems stressed and off. I cook and clean and cater to him, but he just seems off. He is on his phone a lot (which bothers me) and he is nice and reassuring at times and other times kind of just blah. Not sure if anyone has experienced this before? Maybe nerves before the baby? He was going out a little more and he works out a lot, I just kind of feel like I’m not always a priority. I am trying to be understanding maybe he needs his time before our lives change! Just hoping some of you may have experienced something like this before and have any advice? Thank you!