Will chewing gum/jaw exercises help wear off masseter botox?

I've had three botox treatments to my masseters within 6 months, on advice from my Dr. However my masseters have diminished to the point that my cheek area around my mouth corners now sags, from the jaw muscle atrophy and resulting loose skin. Will chewing gum/jaw exercises help wear the botox off faster, or could this build up other muscles and cause facial imbalance? Should I wait until I can see the masseters working again before I try to build them back up? Thank you.