Head injury

in july of last summer i sustained a head injury from a jet ski accident that resulted in bell's palsy phenomenon,i had an MRI and CatScan and after 2 months of shock therapy im almost completely better except that my face twitches in my sleep and some pain on that side of my face... I recently hit my head again (1 month ago) on that same side and i can feel a distinct dent where i hit it... and the bells palsy pain seems a lot more noticeable now... I dont want to have to get another MRI or scan so is there anyone who can reassure me that it'll heal on its own and go away???