My 13 month old is transitioning to 1 nap a day, as keeps refusing second nap or waking up for hours at night. When on two naps, typically he does 1/1.5 hours each for both naps, yet when we do 1 nap he wakes after 45 mins!? This has happened twice when we've attempted 1 nap. This makes his day extremely tiring and he ends up going to bed very overtired. Why is this and has anyone else experienced this? So difficult, I feel I can't get a break at the moment!