So I've had this headache for 3 weeks now. It's mostly just a dull pain in the back of my head, constantly 'burning'. However I also get sharp pains all over my head -where they are changes. I'm also getting dizzy occasionally. The doctor said it was a migraine, and gave me medicine to take it away but it was ineffective. I'm going back to the doctor in 3 days l, but I really want to know what it is?