Throbbing headache.nauseous.light headed.feeling flushed. what's causing this? history of headaches since childhood

Migraine: You are describing a migraine headache. There are effective treatments for this type of headache which are available by prescription; otc preparations like aspirin, acetominophen, caffeine combinations can be helpful as well.

Primary headache: Those with recurrent throbbing headaches with extensive additional features generally have a migraine pattern > tension headaches. When they are >15d/mo they are considered chronic & < 15d/m episodic. A workup with your pcp can help confirm the process & a discussion of lifestyle changes and medications is warrented to get this into control.