K.A.
Call your OB. That's what they're there for. They will help give you peace of mind.
I've heard drinking orange juice can get a baby moving. Try lying down on the couch or bed on your left side and just feel for a little while. Play some music with a nice base so the baby can feel it. I had one that loved Nine Inch Nails' album Pretty Hate Machine, the base was guaranteed to get movement.
You can get one of those heart monitors where you can listen for the heartbeat. While I would have a hard time finding the heartbeat sometimes it was always great at hearing the "thumps" as baby kicked around. When my kids were having a slow day I would use that for peace of mind to hear those thumps to know they were still moving around.