boyfriend and 20 weeks pregnant

I'm 20 weeks pregnant so I moved back in with my mom cause my boyfriend was definitely stressing me out to the max I cried all the time and I couldn't take it ,the smoking , the dog allergics and ect everything got 100X worst when I got pregnant. Once I moved back in he then tells me he's not my responsibility. Aren't you suppose to be my boyfriend, I'm absolutely having his baby I'm not having my moms baby! I can't work right now I'm on light duty and I had to resign from my CNA job. We were doing fine for the last 3 years never really argued then when I got pregnant it's like his entire mood changed he doesn't do nothing for me or with me anymore. I tried talking to him about this & how he made me feel when he told me this. Because let's me honest when your not making your own money sometimes you'll like to get your hair done nails done ect but I simply asked for money for prenatals, he sent me $20 their $35, but as your man isn't he suppose to "help" you and "make you happy" I was a working ALL the time and I hate that I can't now. Now When he goes out to eat and events with his family he doesn't even tell me anymore I always went. His mom recently message me asking me what is wrong why haven't she seen me or anything ! I told her me and him are having problems and arguing about stupid stuff and the fact he never told me they had these events and stuff I didn't wanna get into it to deeply because it is her son ! I just don't know what to do I tried sitting down talking to him and everything.