My topical numbing agnt should've worn off (right?) but I still feel numbness in the center of chin & have paralysis of the right side of my bottom lip. When I try to lower my bottom lip in a grimace, the left side goes down MUCH more than right side.I can only move my bottom lip to my left,& when I try to move it to my right it goes UP?! Is nerve damage possible from injections?How long until I know if this is permanent & should I start exercises now or will moving my lips damage it further?