2 days no baby movement

Cynthia • 20, engaged and ttc.
I am 21 weeks pregnant. And I am used to consistently feeling her move several times a day. Mostly in the mornings, and right before I go to bed. I haven't felt even a tiny poke in 2 days. Should I be worried ? Should I call and see if I can come in to the doctors office ? Is this normal ? I'm kinda freaking myself out.