From the first U/S i would say girl
but the 3D one's do look like there is boy parts, but that is probably just the nub you cant' tell the sex that early by seeing the 3 lines or the winky because it hasn't developed yet.
I think you still have a good chance of seeing 3 lines when you go for your 20 week U/S.
Best of luck hope you get what you want, but two boys would be lovely to 
Becky x