W.D.
Sounds like she is having night terrors. My daughter is almost 3 and she has them. What works for us is that we go into her room and comfort her, make sure she has he blankie & maybe even her pooh bear, tuck her in and sit with her a little while to get he back to sleep. Sometimes I have to lay with her for a little bit...sometimes until she falls back to sleep. ON a few occasions I end up sleeping in her bed the rest of the night, but I try not to do that so she doesn't become dependant on sleeping with me.