Gender disappointment..

I see lots of people post about it but never read any of the comments. But is there any advice on how to deal with this?

I’m on my third and last pregnancy due to health complications at only 25.

I already have two boys but recently found out I’m due another boy.

My children and my husband are so desperate for a girl and it’s breaking my heart that I can’t give them that. I love this baby regardless but I’m dealing with a lot of disappointment and feeling like I’ve let them down. Any advice?