Please help! what is the cause of my throbbing headaches?

Tension headache: There could be many possibilities of throbbing headache. It is usually a sign of increased intracranial pressure from many reasons. You should talk to PCP for a complete evaluation

Migraine: is a serious and complex neurologic disorder. Headache, vertigo, visual disturbances nausea, sensitivity to light, stomachache, dizziness are common symptoms. This condition must be professionally managed. Often use of Excedrin will lead to medication overuse headache. Rec.: see an orofacial pain or headache specialist for evaluation and treatment.