Thank you for your question. Although without being able to examine you I can not offer you the specific advice on diagnosis and treatment that you need, but I would try to provide you some relevant information about your health concern.
There might be two possibilities here that need to be evaluated thoroughly. First, one sided throbbing (or sharp) headache & orbital pain (eye pain) with numbness symptoms could be suggestive of migraine. Factors that may induce your migraine attack may be pills, stress or depression, bright lights, loud noise and traveling. The mainstay of the migraine treatment is always to identify the triggering factors and to avoid them. Triggering factors could be different foods such as cheese, chocolate, alcohol and even few fruits. I would suggest careful record of events that have proceeded with the attack and avoid those factors. In addition, try to rest in a dark & quiet room, meditate, have a balanced diet and avoid taking unnecessary drugs.
Another possibility is Cervical spondylosis or pinched nerve in cervical spine in which pain may be referred and perceived as occurring in the back of head, ears, shoulders, arms or chest, rather than just the neck. Other symptoms may include vertigo, nausea (dizziness). Since you are suffering from continuous headache, please arrange an appointment with a neurologist right away who will evaluate the further underlying disorders by clinically examine you & ordering MRI or CT scan here that may be the main reasons of your headache attacks & other symptoms and can provide you an appropriate treatment. Hope this information proves helpful to you. Take Care & Regards!!!
Only your GP can diagnose, evaluate, treat your pain and you really shouldn't wait and make an appointment with your GP. It could be anything from and ear infection or brain tumor. Take an aspirin for the pain, but only a trained medical professional will be able to diagnose your pain.