C.S.
L.,
Ok,its great that I found this,because my 22mo old daughter has been doing this for at least 3 months now.Its taken me all this time to finally figure it out. Too long a nap in the afternoon and not enough physical play.Example: Yesterday it was cold and rainy,so we spent the day doing puzzles,reading,chasing the ball thru the house,watching a few shows...she had a 2hr nap in the early afternoon.And was up at 3am.
Sleep deprivation is horrible.Hopefully this helps you so you dont end up like me...3 mos later looking for an answer.~laughs~