I think that baby is measuring small is a good sign for it turning to a girl :)
I have lost a lot of faith in nub theory these days... Especially after seeing a perfect boy nub end up being a girl...then there was my nub lol.
If I ever were to have another baby,.. Which I am not lol I would totaly skip the whole nub obsession thing
I can't wait for your u/s :)