If she hasn't been with you that long, she might be especially nervous. Or maybe this is just HER.

Talk to your vet. I hate to suggest this - but maybe short-term use of a weak tranny would help.
OR she could be a bit sick with something else that is keeping her in overdrive. Hyperthyroid maybe? Is she eating? Is her weight ok?

I am sure someone here has an answer.

Bottom line from me: ask the vet.

Good luck! She sounds like such a love and I hope it all works out!