On my own opinion...i think its better for you to get married in the phil...because your gf is pregnant by the time she give birth she will be question by the hospital whos the father then her civil status if she say she's not yet married then obviously, the surname of your baby will be your gf surname...why not marry in civil ceremony for the sake of the baby and also for easier things...you apply then for spouse visa....your baby is a big evidence..already....if in fiancee visa they can bring any dependant they have what more if its your own baby.... sure you two will be together worries is has the biggest part in applying as long as you understand the application and the process of it...supply all the things they required...you will surely be together one day soon....keep on reading and if there are things u dont get you can always ask anyone in the furom so i hope i give some good advice on here......good luck