My son is 14 weeks old and has been taking short naps for a few weeks now. Most last between 35-45 mins and are rarely any longer. I make sure he’s tired enough from doing tummy time, etc etc. Naps in a dark room (his room doesn’t even have windows in it) and white noise loud. He wakes up early and is so fussy when he wakes up. I’ve been told by another nap trainer to keep him in his crib for his allotted nap time of 1.15 and then get him but often times he’s so pissed and it’s hard to hear him cry like that. Is there absolutely anything I can do to remedy this or is this a developmental thing that he will eventually grow out of? And if so, around when is it typical for their sleep cycles for their naps to mature enough for him to nap longer?