59 year old white female, 5ft 2in, 145lbs... good general medical condition.8 months ago I had a rood canal of an upper molar... the next day I suffered a severe Bells Palsy of the facial nerve on the same side, which has not fully recovered. I now need another root canal on the same tooth, but am terrified of the procedure as I am not sure if the Palsy is related to the original root canal. Should I be concerned?