Am I to selfish?

So my husband and I found out we are expecting a baby boy and this is our first baby. Some days I'm really excited about it and other days I'm really bummed that I'm not having a little girl for our first baby. Before we found out we were having a boy I had it in my head I was having a girl I had convinced myself baby was a girl and then we find out baby is a boy. So now I feel so selfish cause I know other couples would kill to have a baby no matter the gender. I know I will love my little man to the end of the earth and back. I just don't know how to work through accepting that baby is not the gender I had expected baby to be. Anyone else struggle with this. Am I just crazy? Please help.