Gender disappointment

So I’m worried, my husband wants a boy and he’s convinced himself that this baby is a boy but according to the ramzi theory and heartbeat theory it would be a girl. I am worried he’s going to be really upset so I have my 10 week blood test coming up with gender and I was going to tell him instead of us doing a gender reveal I just don’t know if it is a girl how he will react I know he will act happy but everyone will see it on his face