My Husband was exactly the same during my first pregnancy. Out all night, stag do's etc. I could never sleep without him and felt so ugly and insecure it was a tough time, when he went out I was up all night and was so tired and emotional.
I tried to speak to him a million times but he was so immature. MY life shouldn't stop because YOURE pregnant, I can't stop living, I want to have fun. It was one of the saddest times for me.
With our second baby he had grown up a lot and was much more responsible and there for me.
He did go out one night and had no phone reception while I was 38 weeks, I was so angry I text him my water had broken. AN HOUR later I got a panicked phone call... I was so angry it was AN HOUR later I didn't answer. He phoned and phoned and ran back home. I was happily sat in bed eating ice cream when he got back, he was livid. He kept saying YOUR WATER HASNT BROKEN. I was so calm I kept repeating " it could have". He was so scared it took over the anger he has against me and he didn't do it again.
Its very hard to reason with men at this stage because its a mixture of them being immature and not ready( once the baby come they do rise to the occasion) and also they are scared. If your mum lives near by, if he next goes out, just pack your bags and leave. Obviously dont break up, just scare him. He is acting like a baby, treat him like one.
Sorry this is happening to you, Ive been there and it really sucked. Your baby is nearly here and the moments of happiness you will experience with it will erase the downs of pregnancy. Also my husband and I are really happy, pregnancy is just very tough on a relationship x x x