Has there been any trauma? Any falls or injuries to the head/neck/mid-back? It is possible that trauma to these areas can cause these symptoms.
If there was no trauma and the onset of the symptoms was insidious or gradual you may want to look into infection or tumor as a cause. I do not mean to scare you, and I am not saying that these are what is causing your symptomatology, but you want to rule these issues out first.
Other causes may be trigeminal neuralgia, bells palsy/facial nerve irritation, and classic migraine. It is suggested to get this checked by your primary care physician. If all tests come back negative, then you may consider seeing a chiropractor for treatment of headaches/migraines before you do any medications. Good luck.
Antonio Marotta, D.C.