Ive only felf baby move once

Courtney

It was at 13 weeks 6 days and I'm 17 weeks Wednesday and have felt nothing since and my mom bought me a knock off Doppler that doesn't pick up crap so I've only picked up heartbeat once I'm overly worried now and have had a regular prenatal visit since my first one at 9 weeks. I work with maternal fetal medicine and am switching my care to them just waiting for them to get my info from the other clinic. They do a scan when I go in in the office but it's been a couple weeks since I went in. I'm being monitored for GD and other reasons is why I go in so often to them. Should I be concerned that I've only felt my baby once and not since?