My friend was told she is having another girl. She had 3 different U/S and they all said it looks like a girl. She had her baby on June 6 and Guess what: It is a Boy. Everyone was in shock. Baby had to wear pink for a while.
Good luck.
My dr. was able to see my baby's little penis at 15w4d. Granted, that was a specialist, so maybe his equipment was able to do a more detailed scan. I got amnio that same day and the chromosomes confirmed it was a boy!
I'd wait until your further along to see if you can see more. I was told that we were having a girl with our first and we had a little boy. Also a friend of mine was told she was also having a girl then at about 30 weeks they did another ultrasound and found out it was a boy.
My friend was told that she was having a girl the whole pregnancy, well from 16 weeks on. She had 4 other u/s after the first one and they always said it was a boy, so she bought all boy stuff and guess what when she gave birth it was a girl. You can never be sure until birth or unless you get an amino.