I do understand how you feel! I decided after my failed IVF, to try naturally. I decided that I just wanted one more baby even if it was another boy. For a few months, I didn't get pregnant, so at age 39 decided to use my last leftover gonal f pen and do a regular IUI. I was shocked to find out on my 1st try that I am now pregnant with twins. They tell me 1 boy and 1 girl. We will see if everything turns out okay. I had always said that if I had another boy, then I would eventually adopt a little girl or 2 out of the foster system. I would have loved them just the same. Maybe one day I will adopt a girl, so my current baby in utero has a sister.
I don't count my chickens until they are hatched, so hopefully both of the babies are healthy and everything goes well.
Don't give up on your dream of having a daughter. She may not come to you in the way you would have liked, but maybe just the way you need.