A New Favorite Pic!

This is one of my new favorite pics of the little dude.  My mom has been putting him to sleep on his side and he does love it.  I am trying to figure out if maybe this is causing confusion at night though when he sleeps on his back.  The last few nights, he has been waking up multiple times.  Maybe this is the dreaded 4 month wakeful I have heard so much about?  Hope it passes quickly!