I would go to a neurologist and have this problem get checked out. I doubt your new problem is related to the old problem, but you never know. It sounds like Bells Palsy or something related. Good Luck.
Pharmacologic management by amitryptline and /or gabapentin may help resume normal nerve function. Seeing a neurologist or Orofacial pain specialist who is experienced in traumatic trigeminal neuropathy is advised.