I am 20 weeks pregnant and i haven't felt my baby move?

Don't worry, I am 20 weeks as well and up until today I don't think I had felt my baby move either but I had an ultrasound a couple days ago and my baby girl is healthy and moving around. The lady who administered my ultrasound said she didn't feel anything until she was 22 week and I guess this is quit common. I have felt a few things that I think may have been my baby but it could have also been gas bubbles (and mostly likely was). I felt one kick today for the first time but I haven't felt anything since. If I were you I wouldn't worry within a couple weeks you should feel something!