I have had this really bad headache for about a week now it's been on and off for much longer. right now i have a cold and pain in my right ear.?

Headaches : Are serious. You need to be checked out and be treated promptly as to what cause it. Of course it could stem from allergies, stress, migraines, sinus infection , ear or throat infection or more serious cases tumors, aneurysm etc plus other signs and symptoms to be considered. Or it could just be a simple case of flu or viral syndrome. Please go see your doctor.