I have panic attacks all the time randomly, cannot drive it i have a panic attack and my vision goes black and i faint, my blood pressure drops completely when i sit, lay and stand, also when i sit up sometimes my vision goes black whats this?

This is something I would seek a thorough evaluation for. With a history/exam and testing a label should be possible. The more worrisome possibilities include a seizure disorder with a prodrome or something affecting your hearts rhythm mechanism.

Certainly would check blood pressure and cardiac functions and blood sugars. If former is stable, would address emotional problems with cognitive behavioral therapy