Hi. My name is Brittany. I am a 24 y/o female. I have suffered from what I call "blackouts" since I was 13ish. I can be standing or sitting and suddenly I will feel dizzy and shakey. My vision will slowly blacken out completely and I can't see anything. I feel tingly all over and my head feels so fuzzy like its full of air and numb at the same time. I have to hold on to something or sit down to keep from falling. I have been checked numerous times. I have had an EKG and ECG with no findings as well as wore a heart monitor for a month. I had either a MRI or CAT scan one...again nothing. I was told at one point it was a sensitivity to caffeine and dehydration combine and was instructed to cut out all caffeine and drink atleast a gallon of water a day. I complied with this for a full year and still had n o change. I was also told at one point that it was hypoglycemia and since have found that was wrong as well. my sugar levels are perfectly fine. I am so weak and tired all the time. It seems as they kinda come and go though. I had symptoms for a couple years then went a year or so without them. Sometimes it is only a month between and sometimes longer. But when the syptom are active I feel like I could sleep for weeks. I know it is not depression as I am a very happy individual bubbly if you will. I just want to get this diagosed and taken care of. Can you help me?