My 10 month old sleeps a ton during the day. We wake him up at 7 then he takes two 2 hour naps then a hot nap at 6 pm then still goes to bed at 9:30. He seems tired rubbing his eyes and stiff as soon as he wakes up. Is this normal? The doctor tells me he's fine and blows it off every time I ask about it but I've never seen another baby sleep this much. Make me worry