single momma

so recently my ex broke up with me I'M 22 weeks pregnant with his baby and I'm beyond still in love with this man but he is with this new girl and she was suppose to be my friend, she has 4 kids 2 different daddies...... he is already telling her he loves her kids and her BUT DOESN'T CHECK ON HIS OWN CHILD....... all the stress has lead me not being able to eat or whatever I eat I throw it back up. Oh and they have only been talking for 2 weeks and I just can't seem to move past it... do you ladies have any idea what I should do cause I'm having a hard time moving on I'm worried I'm stressing my son out cause I'm stressed out......