I would mention it to your Dr most ladies feel their bub by now but like the above poster said your lil one could be moving around while you're sleeping or maybe you don't know what to feel for. My doc had to point out movement to me (: her heart rate sounds good to me BTW
I didnt feel my little man untill around then... Iv noticed he moves a lot at night so that could have been why... Everyone is different.. Deff say something to your dr just incase
Yes just to be certain I would mention it I'm sure everything is fine