Try:
Animal Parade "Warm Milk", chewable tabs.
It is a brand that makes supplements for kids. All natural.
Safe.
You can read about it on Amazon.
You can find it at Whole Foods or natural food stores.
I have used this for my daughter.
Or: 'Hyland's Calms Forte- For Kids."
Which you can also read about and the reviews on Amazon.
All natural.
I use the adult version myself.
Next, at this age they DO have sleep tweaks.
They are changing a lot and in cognition and in imagination.
She also sounds real OVER-tired.
Which makes sleeping worse and over tired kids actually do not fall asleep well nor stay asleep well and they wake more.
She is probably behaving all erratic like that, because... she is so over-tired and not getting a good sleep.
Also at this age, they DO have night-mares and dreaming. So, that wakes them too. You cannot turn off, their imaginations and dreaming/night mares are involuntary.
They also do not have fully developed emotions, at this age.
They don't even know how they feel, it is either one or the other extreme at this age.
Also, if over-stimulated, before bed, some kids just have a HARD time, keying down, on their own. They need to be allowed to "wind-down" and to be verbally cued... as to the night time routine.
I would keep things DARK, in the evening. Only 1 lamp light on. Try and key her down and wind-down. For my son, he liked to watch the show "Little Bear" and it would relax him. I would keep the room dark, and quiet.
have a nightly routine... BEFORE the actual bedtime.
So it allows you to key her down and wind-down... BEFORE the actual bedtime. Thereby, the clock not ticking away and it getting later and later.
For my kids, I start winding them down 1 hour or 1.5 hours, before their actual bed time. Not including their bath.
Once they are keyed down... they are more prone to then feel relaxed.
And, NO horse-play, before bed.
It just gets them all wound up again.