As i remember it post somewhere here in forum it shouldn't be a problemas long as you can submit all the necessary documents need in your visa application and your fiance can state on the sponsor letter how delighted you are to become a parents for your lil one.

Don't stress yourself...be strong in such a hard situation, you will be alright, keep the faith...faith? is that your name?
btw wait another more days to confirm it indeed I'm congratulating you in advance

cheers,
Leah