Not convinced of the gender!

Sabrina
Hi! I had my 20 week ultrasound yesterday and was told we were havin a girl (our second girl and kiddo!). It's great except I was so sure we were having a boy I'm finding it hard to believe. The picture isn't very clear for me - the tech said, "see, not a whole lot going on down there". Though she seemed very sure it was a girl. Question is- what other ways can I get the gender just to try to convince myself of my baby girl? Thanks!