Haven't felt my baby last two days

from 15th week I've been feeling my baby movements each day. First time it was more like fluttering but later it was definetely like she rolled onto her side. And I was happy to feel it so much.
But two days ago I did a bike ride and it appears a bit longer then I've expected (I have been biking each week before my pregnancy, now I do it it rarely and less). I was 16 weeks. And now I don't feel her. I don't have any pain or blood either, but it's bothering me. Did you, guys, have the same experience? Should I call my dr?