Please help!

So I'm gonna try to make this as simple as possible. I've been seeing this guy and not long into the relationship we found out i was pregnant and everything just seems to be going downhill,for example we found out he has two other biological kids.he promised me from the beginning weren't his. And it's not that I'm mad about the kids it's just he doesn't seem to put me as a priority anymore or our baby. It's gotten to the point where all we do is fight. any time we see each other which is once a month maybe he can't even look at me, he doesn't touch me anymore he even goes days without even talking to me and honestly don't know what to do anymore. His excuse for being so distant is since I've been having so much trouble with this pregnancy I haven't been as high maintenance as before. And it really hurts that he can't understand that I have trouble getting out of bed and going to work every day let alone spending countless hours getting ready. Isn't he supposed to love me at my worst? He keeps promising me he loves me and wants to be with me but I just can't believe it anymore. This all has me so stressed I've completely loss all my appetite and couldnt even stomach to hold down water. Needless to say since Saturday night I've been hospitalized twice. And where was he? Am I just overreacting ? I'm really just so hurt and usually get a lot of support from everyone on here. Please be honest with your opinions. I really need this support.