In the back of my head, at night i always have this pain like a headache that makes me sick lightheaded, and dizzy what could this be? had migraine b4

NEEDS EVAL: It is difficult to say if this is a variation of your migraines or something more concerning- the symptoms you mention mae this pain something that needs further eval- we must make sure there is no tumor or aneurysm or other cause- ha should not wake you from sleep- and any new, changing or worsening headache- should have greater eval.