Help me tell my husband we are pregnant

We had a miscarriage last year followed by a full term still birth of a baby boy. We both decided we didn’t want to go through it again for a long time if ever. Husband said only 2 weeks ago to me that he never wants another child ever - it would kill him. And here I am. I just got a positive test. How do I tell him I’m pregnant? I’m afraid he’ll leave me. I can’t do this by myself. This baby is so wanted. I could never get rid of it. I feel like it’s a joke being played on us. I don’t know how to make it through this pregnancy without holding my breath the entire time. Help please.