Has anyone else felt like this and what can I do?

Im pregnant and my boyfriend is getting on my nerves I said to him that once the baby is born I will be staying in with the baby for a good few days after it is born and hes complaining saying that his mam will be upset if the baby isnt down hers once its born. Personally I dont care how his mam or anyone else is going to feel apart from me and my baby. Its stressing me out so much does anyone have any ideas how I can get this sorted out without causing an argument or fall out because talking to him is terrible as he always takes a huff if he doesnt like it.