She just started doing it last night- I went in to her four times in the end. I gave her some calpol because her nose was running a lot, thought it might have been the start of a cold. We'll see I suppose.
That sounds like a night terror. My middle one suffered from that, and still does sometimes aged 5 1/2. It can be what they watch before bedtime. For my little boy it was Shaun the Sheep that petrified him in the night! Just be as calm as you can, and allow them to calm down - works most of the time for me.