Hi there
I also have an 18 month old who is not sleeping well at the moment. Until the last week his day went like this:
6.30 - 7am awake
7.30am milk and breakfast
9.30am snack
10.30-12 nap (gets tiered really early am)
12.30 lunch
3.30pm snack
4.30-5pm dinner
7pm bedtime
Over the last week he goes to bed at 7pm, sometimes he doesn't settle well and sometimes he only sleeps for 45mins-an hour then is often wide awake again until 9.30-10.30pm. If he doesn't wake up in the evening then he is up during the night and sometimes wide awake for an hour or so.
It's so exhausting
He has gone through some unsettled stages in the past where he won't go to bed at night but this is strange.
Any ideas? You're always such a kind and helpful lot!