Aw I hope it's your girl!!!! Seeing ladies get a girl after 3 boys gives me a lot of hope!! :)
That said, I would DEF find out so you don't torture youself! With DS2 we had the tech put the gender in an envelope. She knew we really wanted a girl, and (I thought) understood what we were feeling since she had 3 girls and had always wanted a boy. She seemed SUPER excited and was all smiles while writing down the sex and handing us the envelope that I was so sure it said girl!
. I still wonder why she was so excited for me, unless she a) was just excited for me in general, or b) had bad GD herself and was happy to see someone wanting the opposite sex and getting the same.
I'm leaning towards it's a girl with the rest of the guys, I just don't want you to get your hopes up and have them dashed like I did.
'06
'09
'11
I'm in no way "disappointed" that I have sons, I just want the chance to raise a daughter as well. 
Want to try for a
early next year! 
formerly Saggyrl11