I have dizzy spells, my body shakes, feels as if someone is driving a knife into my brain

I have dizzy spells a lot if I don’t sit down immediately I’ll black out. My body shakes kinda like a seizure. I cannot control it. And nerves in my head tighten up like feels as if someone is driving a knife into my brain. I’m 23 I have got dizzy and blacked out in the past I think it started yet junior year of high school. But like my vision would be black but I could hear my self falling but couldn’t feel a thing what’s going on?

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Ayman Darrag
7:22 am

Hi and welcome to question doctors.com
Dizzy spells and blackouts may be caused by a drop in blood pressure which temporarily reduces the supply of oxygen to the brain. This may occur when getting up quickly from a lying or sitting position (postural hypotension).anaemia also may cause it .but shaking and seizures may be due to low blood sugar or epilepsy …
Then you need to go for CBC and EEG..