
Bless.....they do have funny moods with seasons coming in... if she is eating, drinking, not lethargic as such, playing a bit and hasnt got a temperature then I would keep an eye on her but not be too concerned but she sounds like a typical moody girl beginning her season to me.
if you are concerned with the unusaul behaviour a visit to the vet would be the best option but remember to keep her in the car or carry her so that she doesnt cause to much of a problem with the boys in the surgery.!