Hi MissM and congratulations! Lots of If your fiancé really doesn't want to have a baby and you do, then you may need to go it on your own. It will be a big decision and a hard one for you, but if that's what your heart tells you then that's what you should do. Only you can make the decision to stay or go, or have your baby or not
I was 18 when I had my first baby, I went it alone and did fine. It wasn't always easy, but it's not always easy having a baby with your partner there either. I've done both. ( Just quietly sometimes I think it was easier on my own, I got everything my way, the right way )
Whatever you decide you can always find plenty of support in here