Its actually very normal...some days it can be very active and others not so much.
I weigh 118 and I don't feel no movement at all
Some people dont feel the baby move until 24 weeks.
I'd talk to your doc. It maybe normal . depends on your weight as well. I'm 20 weeks and I know the baby is OK I've heard the heartbeat but it rarely moves . but I'm heavier set .
My midwife sed shud start feeling movement around 22 weeks if u don't befre it very normal