I have had this problem for over 25 years without a diagnosis. I am dizzy 24 hours a day. I feel and act drunk all the time. I pass out 3 or more times a day, sometimes I am awake but cannot move (like cataplexy), sometimes I am fully out, either time my heart races fast. I get a headache on the right side middle of my head before I pass out that lasts for a few minutes to a few hours. any pressure to my right side of my head and my dizziness gets worse. I am very tired all the time. I cannot walk across the room without falling into something. I have been using a wheelchair for a while now. I still pass out even while sitting. I have had CT scans, MRI's, blood tests, ex rays, tested for Meniers, MS, brains tumors, diabetes, hypoglycemia and have none of these things. I have had three heart attacks, high blood pressure, IBS, ulcers. but it is not related to my heart either. I have flashes of light that go from one eye to another around the edges of my view. I also have sleep paralysis. It has steadily gotten worse over the last few years from once a month dizzy spells and sometimes being a klutz to 24 hours a day. I am never hungry anymore, but am always thirsty. the doctors have told me that there is nothing they can do, that I just have one of those mystery problems and have to learn how to live with it. I would love to hold my grandchildren without fear, and go for a few walks. If anyone has any ideas, I would appreciate them. I am very tired and don't even leave the house anymore unless I have to. Its to frustrating to pass out in front of people and have them stare at me and me not even know why I am doing this. I am getting quit a few concussions and cuts and injuries because of this too. I cannot sleep but I am always so tired. I have no pain except spurs in my neck. My family has had a lot of cancers, strokes and heart disease, according to the doctors, I do not have any of these. also they said that this is not caused by anxiety, that there is a cause they just can't find it. been to neurologists, family, surgical, and a few other kinds of doctors and specialists they all say the same thing, something is not right, but they don't know what it is. at least they have not said that I am crazy.