6 month old and 5 weeks pregnant but fiancee not happy!

I'm kind of stuck on what to do, I have a beautiful 6 month old daughter and yesterday found put I was 4-5 weeks pregnant. It was not planned but after struggling with unexplained infertility and then a miscarriage before my daughter I'm finding it hard to be sad when every baby is a miracle. My fiancee however is not happy first he said abortion but I personally don't feel like I could do it. He's being very unsupportive already which scares me as it's the first month of this pregnancy.

I suppose I just needed to write this out as a way to tell someone I'm pregnant and confused.