Lost head

Has anyone seen charlottes head?
So cold today, went for the thinner, thus easier to manoeuvre baby, snow suit today.
Quick trip to the retail park for printer ink, deep joy!

Any advice on the following
Charlotte goes down quite well around 6pm
For the last two nights she has woken around 10pm crying.
The first night I say with her for 1 1/2 hours trying to get her back to sleep. She has milk, she had nappy change, each time she appeared to be asleep I put her down, she sat bolt upright crying.
Eventually I took her into the spare room where she squirmed and fought sleep for a further hour.
Taking her back to her bed, she settled straight down and went back to sleep.
Waking again about four hours later.
Last night she did very similar. This time we got her back to sleep at 10pm but instead had the high jinx at 2am. Spare room used again, back to her bed and settled straight down after an hour. Waking again some three hours later....

How do we crack this before it becomes a pattern?
I know some will say we shouldn't bring her into our bed, but we all need sleep and if this is one way of achieving it, then we will do it.
All advice very gratefully received.