Movements stopped???

Amy • Single mommy to a handsome boy and currently expecting baby #2!
I'm 15 weeks and I haven't felt much movement. I was and for the past 2-3 days I haven't felt anything. I wasn't feeling too much before, but it was a little. I go to my OB tomorrow and I'm gonna ask if they can do the heartbeat monitor on me. Since I don't think I'm gonna get another sonogram until 20 weeks or so. Is it normal? I didn't feel movement with my first until I was 20 some weeks. But this one I felt sooner. And now it's stopped. I'm just a nervous wreck. Lol.