My son is now 15 months old and he has a morning nap at 10:30-1 then can only stay awake until 3 and goes back to sleep 3-5! I try my very best to keep him awake for the afternoon he just can't manage it, is he sleeping to much? Should I be worried? He sleeps 12 hours at night too. It just seems he's sleeping more then being awake 😢