I've been having lightheadedness/dizzy spells for quite a some time now. I've gone to the doctor for it, however they could not find anything wrong; blood pressure is normal, my heart is normal. In recent years it's become that my sight will also go w/ these dizzy spells. The whole room seems to go dark for a few seconds before returning to normal. I've also experienced recently where my whole body goes numb and tingly; feeling like I'm on drugs but I'm not. I had a night where I had seemed to black out and lose control of my body for a couple of minutes. Each spell is never long, but I know it isn't normal and it's been going on for so long, I would just like some possible insight to what is happening to me.