I am feeling your anxiety as I am PG with my third son after really wanting a girl. We tried the methods when we were TTC but you can't change fate!
At the scan I kept it together. I got home and had a big bawl. I still find myself having twinges of jealousy when I see a little pink bundle in a pram and know that I will never have one of those...
BUT on the other hand I am very much in love with my little boys and it didn't take me very long at all to shake off the dissapointment I felt. I am now very much looking forward to meeting my son in a few weeks time.