For the past 8 weeks my now 14 month old has been waking in the night, sometime from midnight - 1am, and staying awake for up to 2 hours. She cries and cries hysterically basically until she passes out. Nothing seems to help, we've tried water, milk, calpol, putting her in our bed. It's as though until 2 hours is up she just can't sleep. The 2 hours are usually spent stood up holding her until she's able to be put down, which takes lots of attempts. After this she will go back down and sleep soundly till morning.
Nap length doesn't seem to change anything. Some days will be 2 naps, others 1 nap. They can total from 1.5 hours - 3 hours in total but nights are always the same. She wakes around 7am no matter what and goes to bed around 7.30pm. She still has a bottle before bed for comfort mostly.
Any ideas what we can do to help her? It's so distressing hearing her cry like this every night (not to mention exhausting for everyone involved!)