She has said & told you, what is bothering her:
She is 'scared'
She does not like her big girl bed.
Digression (putting her back in her crib)... sometimes is useful, until a child is better about the transition.
My son, was in his crib even at 3 years old. Then one day he told us he's done with his crib and wanted to be in a bed. So then we put him in a bed. He was fine.
My son LOVED his crib and slept so well in it.
When "he" was ready for a bed... he did so, just fine.
With no transition problems.
Also, at 2 years old.... sleep tweaks commonly happens. AND, they do get 'fears' at night... which is developmental based. Their cognition is changing. From this age on up, they do get night time 'fears.' And their imaginations are changing.
She is obviously also over-tired. Which makes it harder for kids to fall asleep. And, some over-tired kids, even get more 'hyper' the more tired they are. Thus they cannot wind-down well nor fall asleep well and cannot sleep well and wake more.
Or, have her sleep on the floor.
She does not have to be IN her 'bed' per say. Just as long as she gets sleep. My daughter did that at that age. It was a phase. No biggie. She got sleep that way.
By the way, the brand "Animal Parade" which makes good natural kids vitamins, has something called "Warm Milk" which helps calm and soothe children before bedtime. Its a chewable. Places like Whole Foods has it.
It has good reviews. I used that for my daughter.
Also before bed, like 1 hour before bed.... make EVERYTHING dark and quiet, and boring. Just keep 1 dim light on. Also give her verbal head's up that bedtime is soon, and now it is 'wind-down' time. Kids need to be told, BEFORE hand, what is coming up. So that they can transition. BEFORE bedtime. Not 'at' bedtime.
Your daughter, seems to need to 'wind-down' first... before bed. Not 'at' bed time.
all the best,
Susan