My 23 month old pops up after a one hour nap every afternoon. If I insist he lies down again and closes his eyes, he might sleep for 10 mins more. He sleeps for 11 hrs max at night; usually it is more like 10.5 hrs. Goes to bed at 7:30 and wakes up around 6:00/6:15. Naps at 1. I hate feeling like he's not getting enough sleep everyday!! Could this be enough? He does yawn even after to wakes up from nap and in the morning.