My son is 18 months old and for the past 2 weeks or so his sleep is all over the place.
He is waking up every day before 6am, usually between 5.15 and 5.45am.
His lunchtime nap can be anywhere from non existent to 1.5 hours to 2.5 hours.
I generally don't let him sleep more than 2 hours unless he is unwell.
We have played around with bed times too but his sleep is getting worse and more unpredictable.
Typical day before looked like.
6.30-6.45am - wake
12.15-12.30 - begin nap
2.30 - wake
6.30-7pm - bed
Now he can be still awake at 8.30pm despite being put down at 7pm.
He is waking every morning crying too so he hasn't had quality sleep.
He is also having several false starts and night wakings too.
He dropped his other nap very early at around 12 months. I don't think he is ready to drop his nap but is is impacting on his sleep.