What Can I Do as a mother?

I was with my babies father for 2 years, loved him more than anything.. All he did was cheat, I am now 19 weeks pregnant with his baby, as he told me all along he could not have kids..I am 21 years old and he is 27... We split up just before I found out about being pregnant because he decided he wanted to be on dating sites instead. A week after I told him I was pregnant with his kid he got back with his girlfriend who is 19, and now today he told me that she is also pregnant now and I am absolutely devastated.... I do not want my child to have to be with him, his new girlfriend, and their baby... I know my child will be treated differently... oh man, I have so much running through my mind right now and I cant stop crying, I know the stress is bad for the baby... it seems like he loves making me hurt! Sorry for the rambling and not asking a question, i just need to type this out and be heard i guess...