I agree with the poster above.

Please, please do not do that to a (future) child. I'm sorry you're struggling so badly right now, but a baby is not going to fix it and it is incredibly selfish to bring a human being into the world in less than ideal circumstances with the expectation that it'll fix your life. Babies are living breathing individual beings who will have to grow up and live in the world dealing with whatever start they were given, not just some quick token to your happiness. The situation and timing already sounds less than ideal to bring a baby into, and especially if you're being that impatient and rash and would even be willing to do something like forcing your fiance into it, you need to just stop.