Serious gender disappointment....

I have some serious gender disappointment. We had only planned on two kids. But we decided to go for three and here we are. I originally had no preference but I had convinced myself this was a girl and thought since my youngest is a girl that might be best since they would be close in age. We found out it’s a boy. I can’t stop thinking that maybe this was a mistake and am so sad it’s not a girl. I know when this baby is born I’ll love him with all my heart but I can’t stop feeling this way! I feel so guilty. My husband said “if you’re that sad I’ll just put another one in you” 😂. But I don’t really know if we can afford four (daycare) and that would seriously be insane! But now I can’t stop thinking of having four. But I know even if we “tried” and did all the things they say to get a girl there is no guarantee it will be one and I could have three boys and one girl. I don’t really know what to do to get over this. I keep hoping my 20 week scan will prove the nipt text wrong and it will be a girl but I know that’s highly unlikely. I’ll be 36 when this baby is born, my kids will be 5 (boy) and 3 (girl). Anyone been through this or have any suggestions??