I feel like I'm crazy....

So my first and only pregnancy thus far has been terrible. My boyfriend had cheated on me right before u found out I was pregnant. I decided to stay after I found out because of this.... My mistake. Well he cheated on me again and a few more times without me knowing. I was miserable my whole pregnancy because of this. He then dumped me for another women at 7 months pregnant. :/
I just wanted to be happy and be in the spot light when I was pregnant. I just hid away and never talked to anyone. I hid my belly because I was embarassed to be pregnant by such a man. 
Now I'm with a new man and he decided he does not want children. Whenever I see another women pregnant I just get so mad and jealous that it's not me. I don't think this is a deal breaker between me and my new SO. He's wonderful and treats me awesome but I do want another child.
How do I get over this? I feel terrible for hating on other pregnant women because, well they're pregnant and HAPPY. And I won't ever have that agian. Any help here?