Is it worth it?

Right now I'm 15 weeks pregnant and I haven't had an ultrasound since week 8. My next appointment is a week from today but I won't get another ultrasound until the anatomy scan and I won't find out the date of the anatomy scan until the end of my next appointment. I see all these pictures of ultrasounds on here and I'm just so anxious to see my baby and find out his/her gender so I can start baby shopping. I know you can get a private ultrasound but is it worth it or should I just wait a few weeks?