I adopted two 6 month old cats about three weeks ago. They were declawed/neuter...
It sounds like your cat may be a little stressed. Because of their sensitive nature, cats can sometimes get stressed out and display stress-related behaviors.
Some of the most common causes of cat stress are: changes in the immediate environment, introduction of a new pet into the family, sudden loud noises, unfamiliar smells or the absence of certain family members.
Some signs of stress include: hiding, unusual fearfulness or aggression, excessive vocalizing, urine marking, changes in eating habits or eliminating outside the litter box.
If you notice signs of stress in your cat, try to identify the cause, then take steps to help your cat cope. In many situations, spending more time with him while gently grooming and speaking softly to him can be wonderfully calming. If an environmental change is the trigger, try to slowly get your cat used to the new situation.
If your cat's stress doesn't seem to diminish within a few days, have a talk with your vet about other ways of treating her, which in some cases may even include anti-anxiety medications.