trying to be strong :(

So I'm 31 weeks pregnant with my first child. The pregnancy was unplanned and I wanted to terminate but my boyfriend at the time convinced me to keep the baby and promised he would be there/we would be a family. He cheated and left me for another woman he now lives with. I went through a severe depression for about 5 weeks where I couldn't focus on anything I could barely eat and he's SO insensitive about it all telling me I need to man up. It's been 7 weeks since that all happened and I have been getting stronger yet today due to an argument about the baby name (he only wants one name I don't want) he like goes OFF asking what kind of mother claims she's too stressed to pick their child's name amongst other hurtful things (I'm pathetic, I need to get off my high horse and humble myself etc) and said it's time for me to put my big girl panties on and get over it because I'm a mom now. Like wow how can you question who I am/would be as a mother simply because I haven't chosen a baby name (which by the way every name I gave him he shot down and has switched from requiring it to start with the letter of his first name to him not caring what the name is several times) . Am I being too sensitive? Is he correct or if he just an asshole?