I was supposed to be abroad for the semester.  Mid February, on 2/21, I went to class in the morning and got the feeling of being light-headed, spacey and weak.  Before the episode started, my hands felt really hot and clammy.  After class, I went back to my senoras house to rest, but it did not get better.  CC-CS decided to take me to the clinic to see what was wrong.  The doctor there wasn't sure and decided to do a blood test, which turned out normal.  Around noon, I called home.  About a week before this, I was sitting at dinner and got the similar feeling.  I felt really out of it, light-headed feeling in both my head and my knees, spacey.  I did not have the clammy feeling in my hands, however.  I didn't think anything of it and just went to bed.  I felt fine the next morning.  The next day after calling my mom (Thursday), my dad flew out because I had not gotten any better.  We tried walking, but every time I was out, I got the symptoms and had to sit or go back to the hotel.  On Saturday, I had the episodes so bad that I felt like I couldn't stand on my own, so my dad decided to take me to the ER.  The doctor there diagnosed me as possibly having vertigo.  At the hospital, they checked my heart and took blood and everything was normal.  To cure vertigo, the doctor gave me medicine.  The medication didn't work however.  After nine days with my dad, I was no better, so we decided on 2/28 that it was best for me to come home to pursue further testing and to see doctors.  So far I have seen: Neurologist, my primary doctor, ENT, ENT, Endocrinologist.  When I get the episodes, the feelings that I experience are: The episodes always start with feelings in my hands (clammy and hot).  Feeling of light-headedness in head and similar feeling in my knees.  Feeling spacey and out of it.  Weak and feeling faint/feeling like I am going to collapse.  When the episode is severe, I find that I have to try extra hard to focus to try to let it pass. The episodes can happen anywhere, at any time.  Typically, they don't start until the afternoon.  I have noticed that they occur almost every time I am in a car, both driving and as a passenger.  I notice it the most in my knees; I feel like I have to concentrate extra hard to make sure I don't actually collapse.  Although the episodes have been taking place since mid February, I started to keep a log of them sine the end of March when my visits to doctors subsided somewhat.  Here is a log of the times, severity, and what I was doing when the episodes took place.  Prior to this log I would typically have the episodes four to six times per day on average.  There has not been one day since February 21, 2008 when I called my mom that I have not had any episodes.  I stopped recording at this point.  The episodes happen at times, mostly mild to moderate on a daily basis.  It has been like this until June 1, 2008.  From June 1 to June 20 I have had no episodes at all and have felt like my normal self, thinking that whatever happened to me is finally gone.  On June 20, though, I had many episodes on an off all day long which was weird.  They were not too long and they were mild; I did feel like I was going to "collapse".  I was out of town for the day with my internship.  I have had no episodes since then.