DD is 10months old, always woke atleast once for a quick feed (no crying, just really fidgety really) usually did 8pm-3/4...then up at7am
now she is going down about 8pm, until 12:30/1:30am, grizzling like a pain sound, dummy doesnt settle, or cuddles. so i feed her, then she still fidgets and gets cross if i dont give her more milk. (ONLY since the last 2 weeks) must add that she got her first tooth last week.
Im having a similar experience. My 10mnth old has slept from 7pm-6amish from about 4 months old. But the last 3 weeks or so is waking at 12-1am and is grizzling and fidgeting/thrashing about until around 3am. She is also having disturbed/broken sleep from when she goes to bed until that time.
I think the pain of teething must be pretty constant for them, even when the teeth arent actually breaking through, they are still moving up from jaw/gums?