My head has been hurting on the front left side in the same spot for about two weeks. i am concerned i may have a brain tumor. what do you think ?

Tumor not likely: Brain tumors rarely hurt. See a neurologist

See a neurologist: Headache that is lasting so long needs immediate attention. You must see either a primary care physician tomorrow or go see a neurologist. You either have Migraine or something more serious. it is easy to make a diagnosis is of serious conditions like a brain tumor very quickly with help from a CT scan or MRI of brain.