Thanks for your reply. He is feeding every 4 hrs, but our schedules isn't typical EAS because of short naps. Yesterday looked like this:
Wake up 7:15
E 7:30
A 1 hr 40 mins (first yawn was at 1 hr 15, started wind down & shh/pat at 1 hr 30)
S 9:00-9:33 (woke up happy)
A 1 hr 15 mins (fell asleep in the stroller, woke up happy)
S 10:40 - 11:10
E 11:30
A 1 hr 30 mins
S 12:40 - 1:10 (woke up happy)
A 1 hr 40 mins
S 2:50 - 3:20 (woke up happy)
E 3:30
A 1 hr 50
S 5:00-5:25 (woke up crying)
A 1 hr 50 (started bedtime routine - bath, pjs, nurse, book)
E 6:30
S 7:10
E 7:40 (woke up after 30 minutes but fell asleep while nursing)
11pm - resettled with shh/pat
3 am - nursed
5:30 - woke up due to gas, resettled with shh/pat
7:30 awake for the day
The day before yesterday, his first nap was 55 mins (woke up happy) and his second nap was 1 hr 20 mins with 1 hr 40 awake time in between.
I'm wondering if he is maybe under tired to begin with, but as the day progresses he becomes over tired?