If your main scare is being a single mother of two, given that you are breaking up with the guy you might as well stop being scared of that since it is what life is going to be. This doesn't mean you can't handle it. Talk to your doc and tell him about the stress and anxiety and see if he can offer suggestions. Even a short-term run on an antidepressant might help (if there is one that is safe during pregnancy).
Well first of all..you dont need a man who is going to cost u to stress yourself during your pregnancy; this is the time you are suppose to be happy and glowing. If he not happy about the baby then thats on him but, im sure you want your baby. Dont worry about hiw ppl feel bcz they can cost you and your baby due to stree and no body want that. Just pray about every thing and know that your are a diamond in the sky.