That's awful how cruel of him to leave you at a time like this.
I personally would avoid a c section at all costs if you aren't going to have any support. Recovering from a c section is going to be extremely difficult if you don't have anyone to help you.
I hope that your husband comes to his senses and decides to step up as a father for his unborn child. If he doesn't want to be in the marriage, fine.. But he shouldn't abandon his child & he should be there to support you as the mother of his child. Sounds like you might be better off without this disappointment in your life.