I didn't start feeling my baby move until around 28 weeks. I started to feel him move when I was lying on my back.
It also could depend on where the placenta is. If it is in front, baby hits it like a pillow and we won't realize til later on.
I'm 21 weeks and I only feel my little guy after I eat, if I'm leaning forward too much or if Daddy is talking. I worries me when I don't feel him for long periods of time, but my doc said its normal at 21 weeks.
I didn't feel my baby move regularly until 24-26 weeks or so and now he won't stop! Ask your doctor at the next visit and she may have you count the movements. He usually moves when I set sit back on the couch and relax with a glass of water. Don't freak out too much
Also drink a large glass of ice water and lay in a quiet room. That should do the trick. You may be getting dehydrated.
Im 22 weeks too & i only feel my baby move at night sometimes.. Im not worried about it because the baby is still little! Give it a few weeks and its all your gonna feel!! Plus if this is your first pregnancy you wont feel it as early.