Scared but trying not to be.

In 2017 I lost a little boy who was stillborn at 35 weeks. 3 1/2 years later ( March 17 2021) I found out that I am pregnant again with my rainbow 🌈 baby. I am both excited and scared. My boyfriend now ( not the father of my son) says that I am letting the fear in my life to much and that I should be more excited. I tell him that I am excited but I am scared that we will lose this one too. I want this rainbow 🌈 baby so much. I would give anything to have a normal pregnancy and a healthy baby. How do I put my fear I aside and be happy for my rainbow 🌈 baby.