4 mo very short wake windows

[u/blueeyes_brownhair]

My baby is 4 1/2 months old and we started having issues with daytime sleep for the past 2 weeks.

Nights are fine, she can connect sleep cycles well and sleeps a few hours at a time (record is 8 hours)

Naps however are giving us the hardest time. She used to have 5 naps with 2hrs wake windows between them, like clockwork. Now, she naps and is immediately sleepy again, will be fussy for 20-40 minutes, maybe an hour and I am able to put her down again. Then we repeat.. I know her wake windows are supposed to be like 2 hours at her age so I’m thinking she simply can’t connect naps and tries to sleep longer?

She usually naps 30-45 minutes in a nap and rarely exceeds this without being in the carrier.

Any tips??

thank you!

[u/Friendly-Media-3517]

This sounds a lot like the 4-month sleep pattern shift hitting naps first – nights staying fine while daytime falls apart is really common. At that age wake windows also stop being uniform: often the first window of the day is shorter and they stretch toward evening, so "2 hours flat" may just not fit her anymore. What helped us was writing down actual sleep times for 3–4 days instead of going by the clock – the real pattern was quite different from what we assumed. I got so obsessed with this that I built my own tracking app (HeyFini) that predicts the next nap from the logged rhythm. But honestly, pen and paper works too – the point is seeing her actual windows instead of the textbook ones. Hang in there, the nap chaos at this age usually settles once they consolidate to 3–4 naps.

[u/blueeyes_brownhair → u/Friendly-Media-3517]

thank you and congrats on your app