I have the exact same dizzy/ gonna pass out feelings, what's strange is ; I'll get the initial pass out feeling followed by brief cold sweats , and rapid heart beat. I have to stop whatever I'm doing at that moment and lay down ( which sucks, cause I'm a tattoo artist and have to fight it till tattoo is finished) after laying down a strange euforic? Type of feeling will stick with me for rest of day, along with blurred vision, light sensitivity , thoughts of heart attacks , brain tumors, kidney disease, and extreme fear of dieing flood my mind. Smoking makes it worse, but I still do it out of stress. I've just this last 6 months or so have been getting the dizzy faint attack, but have been having good ol chest hurt, heart racking panic attacks for about 9 years now. I've noticed that turning my head too far in one direction can cause a similar feeling, as well as keeping my arms above my head for a short time. I'm starting to wonder if I have an inner ear problem that contributes? I know I don't breathing well while sleeping due to my tonsils being bad. But alas, I have no insurance, and cannot have them removed.