He has 12-13 hours of sleep at night, sometimes all the way through, sometimes wakes up once or twice for us to give him some water and his dummy.
If he wakes up at 7am, like today, he's already completely exhausted by 9am and by 9.30am he's in full on screaming mode, banging his head on the living room door angrily because he just wants to go to bed. He's asleep now and could have anywhere from 1.5 to 3 hours nap.
Later on it'll be a similar story - tired already after only being awake for an hour or two, despite having had plenty of sleep. He usually has two naps a day adding up to 3-4 hours of daytime sleep.
I don't understand why he seems to be getting more tired these days instead of being able to stay awake for longer periods as he gets older. I was expecting him to be able to stay awake for at least 3 hours by this age before getting cranky.
Any thoughts?