Single parent in marriage

We have a 6 month old son, and I’m currently on a 1 year maternity leave. My husband had 2 weeks paternity when our son was born via C-section and I have been mainly on my own since then. No family as I’m estranged due to childhood abuse from my own family, and his parents has become estranged due to their behaviour during my pregnancy (insane comments, trying to force themself into the room when I was delivering and sadly so much more) A few random conversations made me realise how little my husband understands. He keeps going on about how easy I have it, and how hard he has it at work. He watched our son for 45 minutes while I was at the dentist (I fed, napped and changed our son before I left) He did not stop going on about how easy it was caring for him. But when he has to do something he loses his temper so quickly and shouts. Or when the baby has gone nr 2 in his nappy he always needs help to change him. After 6 months of waking up multiple times over night and early mornings I asked if he could get up with him to give me a chance to sleep in or let me have a nap during the day. His answer was «why? You lay down to relax when you breastfeed him ? That’s more then I get to do at work» All this attitude about how easy I have it, which makes the next part confusing. I stated I will soon have my « get in touch dates» at work, he asked me how I feel about «sleeping drugs» to help our baby sleep. I did not quite understand what he meant, but he said it’s a baby safe tool to make them sleep. I’m sorry? I’m going back to work, only 1 shift a week as he decided for me and now we are talking about sleep aids ? Why? Because he wakes up sometimes at night ? Because he wakes up early ? I’m scared to go back to work and part of me feel like he never accepted his son or loves him as he never spends time with him or does anything with him unless asked. I cry so much as I feel so stuck and alone. Is this just a phase ? I don’t see the man I married anymore and I’m worried about me and my babies future