I just dont know after losing a child.

So my fiance and myself lost our daughter 2 months ago. And we put having another baby in God's hands. & i just took a test today since I was 4 days late. And I think it's positive. But my emotions are every where. I'm thankful if it's true that God gave us this gift, but I'm also terrified of this one having a condition or something going wrong. I cant go through another 9 months and give birth and watch my child's heart stop beating again. I'm a mess. Also this looks positive right? Fiance doesn't think so. And it took a while to pop up.