{{{HUGS}}}
It sounds like he's not quiet ready for 1 nap so I would try for 2 naps again & try shortening it to about 45mins. The thing is... 1.5hr morning nap is more often too long for a pm nap in a 13mo so rather than going cold turkey you could either let him sleep all he wants in the morning & try for a catnap in the pm. Or you could start waking him up earlier from the morning nap & offer a longer pm nap or if you are going to go cold turkey then you really need to offer earlier bedtimes so that he is not awake for 6hrs before bedtime'
Am I doing WI/WO wrong?
How are you doing it?
How long should his A time be at this age?
If I reintroduce the AM nap when should I do it (he used to nap 3.5 hours after waking in AM)?
How short should AM nap be?
How much A time in PM for PM nap?
Ok... this ranges alot between babies but this is what worked for my dd. Morning A time about 3.5hrs (to be in the cot by) & then on a 45min morning nap she could do 3.5hrs A time. On a 30min morning nap she would do 3hrs A time. So if you are going to shorten the morning nap to 45mins... which is what I would recommend to help you get back on track with overtiredness, I would try something liike this:
6am - wakes
9.30-10:15 - mornign nap (you wake him up)
1:30-1:45 - afternoon nap
3-3.30 - afternoon nap ends
6.30-7pm - bedtime
On a 30min morning nap
6am - wakes
9.30-10 - morning nap
1-2.30 - afternoon nap
6.30ish - bedtime
Today he woke up super late (7:20) so I tried to put him down for his nap around 11:40 but he fought it for 20 mins before finally going to sleep at 12.
There are going to be days when he will wake later than his usual wake up time & its up to you if you want to allow him to "sleep in" and then aim for 1 nap or you could wake him up in the morning to make sure he has 2 naps. So on a day like today when he woke at 7.20, I would probably do 1 nap around 4-4.5hrs into his A time.
Personally short morning nap & long pm nap worked best for us. Some babies will still fight the afternoon nap on a short am nap OR take a short am & short pm nap but its up to you if you want to then shorten the morning nap again (to 30mins or even 20mins) and give it a few days before his 2nd nap increases or you could go cold turkey but you do need to then adjust bedtime hour to the wake up from the 1 nap he takes. If he wakes from the 1 nap at 1pm then I would put to bed no later than 5hrs A time... so that would be 6pm bedtime.
Isabella was the same age when she started fighting her pm nap on a morning nap as long as 1hr. I too went colg turkey & OMG the night wakings were horrible!!! I didn't know what was going on .... the night wakings went away as soon as I reintroduced the morning nap.
Hang in there... its a tough transition. I don't think you can totally avoid overtiredness during this transition but you can try & stay on top of it with earlier bedtimes & maybe even going back to read the baby's cues... where if he seems to be needing an afternoon nap 3hrs into his A time.. then there is no harm in trying. The wake up time with us ranged from 5.30-7am & bedtimes ranged from 5pm-7pm (although there was once a 4.30pm bedtime too).
Post back with any other q's
Layla