Hi! I am only answering this to help anyone who googles it because I was desperately looking for answers!
So I was experiencing this with my 4.5 month old…false start EVERY night bang on 45 mins. Assumed it was a 4 month sleep regression and probably was in part.
It took alot of experimenting but I think ultimately it was down to his daytime sleep and wake windows.
So instead of 4 short naps (he’s a cat napper) I started resettling him after 45 mins on his first nap so he’d do another sleep cycle so 1:30 total. He’d have just two more naps of 45 mins so 3 hrs daytime sleep total. 4th nap dropped… Bearing in mind that by the time I cracked this he was almost six months old. I also experimented with wake windows. I was popping him down for a nap at 2hrs and he was fighting it, but because he was eye rubbing and yawning I would persist. Seems the sweet spot was actually 2:15-2:45.
I was previously stretching the final wake window to build sleep pressure as advised, however, this didn’t suit him. He goes down much better with a similar wake window at night, in fact a smaller one!
I have FINALLY got my evenings back. Hallelujah! He is also much less restless in the crib now and wakes once a night for a feed (he’s bf).
Worth mentioning that he’s currently weaning onto solids too…but honestly, I think this made no difference and it is deffo down to his sleep patterns.
OH also worth mentioning…it took a few days for this new pattern to stick. It started with no nap fights and then the false starts stopped. So go with your gut and stick with it for a few days before you try something new.
Xxx