Sounds like you're getting somewhere, which is great.
I think one of the hardest things, as you mention, is that there are so many variables that could cause NWs or EWs. And it's pretty impossible to try and eliminate them all. You know what I mean?
Yes, I think maybe OT too, so rather than 3.25 A for second one, I've done 3 again. Dreading him doing an UT nap though. Just put him down, so we'll see.
Last night was shocking, again.
We had a 1.5hr NW. 3.30 woke up and for 30mins cried out intermittently, and then tried to put himself back to sleep. At 4am I decided to see if he needed my help (he wasn't crying, more crying out). I could tell he wanted to go to sleep, he wasn't sitting up etc. but his nose sounded a bit blocked, so I'm not sure if that was what was bothering him.
By 4.30 and him still not asleep, I gave him a small feed. Had to read a couple of stories etc. And then he fell asleep again around 5.10am. WOke briefly at 6.50 chatting, but fell asleep again and I then had to wake him at 7.30. I know I shouldn't have lety him sleep so long, but when I heard him at 6.50, I was so tired I could barely open my eyes (have been up for min 2hrs every night for the past three nights). Doesn't seem like an OT wake though does it? OT usually causes a few random ones and usually easy to settle. You also might expect an EW like 4.30 or 5 with OT, but this seemed a bit weird for OT. Then again, I know he can do 11hrs/11.5hr nights, as he was previously, so something is going on.
SO I don't want to have a knee jerk reaction, but I'm wondering if he needs a cut in day sleep again (we were getting long NWs a few weeks back and cut sleep from 2.75 to 2.5 and it helped. for a while that is). Put him down this morn 3hrs after wake up and woke him after 45 mins. Just now put him down after 3hrs A and hope for 1.5hrs straight with no re-settles. And then BT 4hrs after waking from that nap again. Well, that's the aim of today. What will happen, who knows.
What advice have you been given previously about OT?