We had a short NW'ing at 3:30, but my LO slept until 6:40!!!!! I can't believe it!!

Really happy with this!!!
I am going to hold my hands up and say that I have no clue what A time to try! I am of 3 minds....
Mind #1 -- Go for 4h30m to 4h45min. Sounds odd, sounds drastic, sounds like setting up for failure. But we are pushing 4.5 hours here. After a solid month of no problems on 5h15m we went down to 5h. A few days of that and we got into an OT spell - and naptime ended up being at 4h15m, and he was sleeping 2.5 hours. Teeth, growth spurt, or both, not sure. But he has only just worked back up to 4h45minutes now. Not saying that just because my LO does that at the same age as yours means ANYTHING, but it makes me wonder if we have been getting him OT by even having the 5h A time in the morning. He's learning to walk, he's teething.....all things that make him more tired. So that is one thought I have.
Mind #2 - 5h. It's pretty average for this age and we had a few days when the 5h of A time got a good nap. So of course stick with what is working, right?
Mind #3 - 5h hasn't ALWAYS worked and we aren't sure if his nap refusal is due to OT or not....so that would be an indicator for 5h30m (or at least more than 5h)...right?
So totally noooooooooooo help at all here in what to do. I have stopped worrying about the A time here for the morning, because it has been more random than anything. I won't let him go down at 4h, I make him go to 4h15 at the least, try my best to push to 4h30 but I also don't try to get him to sleep at 4h30 if he's not tired because that is so much earlier than he used to do. I have been totally 100% watching the signs. First meltdown, first yawn, etc, and I start to get on the bed wagon! So I am not really much help other than to say can you just watch him and see how he is, and put him down when he's tired?

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