It's a Girl?!?

We had the ultrasound done last week and I finally got around today to post them. The first one is the profile of our baby what looks like is sucking on the placenta. The second one is of baby's foot. The last one is of baby in profile sucking on the thumb. The tech told us she thinks it's a girl. It's because we didn't see anything between her legs. No hotdog bun or hamburger. :-( It's making me want to go get a 4D ultrasound. The people at the desk told me it's only $150. Don't you think it's worth it to find out?