Tiny flutters?!

Mia • TTC number 2💗
Hey everyone!
I'm 11 weeks...a couple of times I have felt this fluttering sort of twitching feeling right above my pelvis when I am lying in bed doing nothing. 
It lasts maybe 5 seconds...when do you usually feel baby move? Is it around 16 weeks? What is this feeling that I'm having?! 
Has anyone else felt the same? 😌