@Aliceandthemarchhare
I never thought I would but I think I’m just going to have to stick him in a room and let him scream. This is awful.
I think he is too young for any type of cry it out sleep training, it would probably do more harm than good.
I have an almost five month old and he also sleeps pretty well at night, but it changes so quickly! I think we are in a routine and then what he wants is different. He also goes to bed at 9ish, its gradually come forward over time so im not worried that that is late at the minute - it will get earlier.
If it was up to him he wouldn't nap at all, all day! I generally get one longer nap a day but that has to be contact, all others will be 30 mins - from what I have read that is normal. You say you can't force him to nap but I've found with mine thats exactly what I have to do! By various means - car, bouncing the bouncer, pram, wearing him in a sling, rocking, singing, shushing, stroking...you name it!!
He does go to sleep independently at bedtime so he can do it, but at the minute he doesn't want to for naps which sometimes I worry about, but other days I'm just going with.
I dont know if it is worth trying to force him into a nap with a shorter wake window.
One thing to remember is that they haven't read all the websites we have that says they should sleep X hours per day!! Every baby is different. Hard though when they are grouchy due to tiredness I know. 