I have been experiencing dizziness, passing out for maybe five years. I though it was Vertigo and was told it was Positioning Vertigo. Was sent for Cardiology test and everything was fine. The Vertigo doctor seems to think that when I through my head back to put eye drops in or lay on right and or left side I get dizzy. He's thinking maybe that there is a Pinched Artery and will be setting me up to see a Neurologist. What do you think?