I used to have a sharp pain in the head for 3 weeks around mid June 07 for 3 weeks.The pain didnt go away even after i wake up from sleep.I consulted a doctor only after the pain has gone slightly.Now i dont feel pain but I feel extremely fatigued and i cant feel the "stress" on both sides of my head.I feel numbness in my hands and a weird but painless throbbing sensation on my legs occasionally.I feel that I cant concentrate and have trouble remembering things.At times I cant balance well when i walk fast although not to the point of falling over.Ive done countless blood tests.And recently i went for a Nerve Conduction Study when i visited a specialist and waiting for the result.Ive visited many clinics and they keep saying im fine.But i feel extremely tired all the time.Do I need to go for scans?