A week ago I began to experience severe pain in the left side of my head . On Sunday I woke up with severe pain affecting the back of the neck, and I have no history of headaches or migraines.

Since your question did a week ago , you may have already searched for a solution to your problem. Without an examination it is difficult to determine the source of your headache . Sinus infections , ear , dental problems, temporomandibular syndrome and other conditions may be the root of your symptoms. Any pain that persists head again ( or a change in the pattern of headache for a person with a history of recurrent headaches ) justifies a medical examination. Some headaches are caused by underlying , such as aneurysms or brain tumors disorders. If your headache persists and has not sought medical attention , see your doctor . I have attached a link that may be of interest.