Big Paws Only Dog Forums

My 5 year old Bulldog Mix has recently started acting out.  Chewing furniture, magazines, shoes, leather belts, and pretty much anything that she can get her mouth on.  I reprimand her but then she pouts and tries to apologize and I don't know how to act.  This may sound funny but she really does have a soft heart and she understands how to express feelings. Why is she acting out and how can I stop it?  Please, can anyone help?
Wende