I was sick with severe coughing a couple of weeks ago. cough has gone away but now im left with this headache that wont go away. ?

Headache: Persistent headaches warrant an evaluation by your physician or neurologist. They could be muscle contraction tension headaches, but a paranasal sinus infection is a possibility since you had a recent respiratory tract infection. High blood pressure, migraine, intracranial pathology like pseudotumor, actual brain tumor, intracranial bleed, temporal arteritis are other possibilities.