I suffer from severe weakness in my legs and arms (often collapse, had problems with passing out that were improved a bit with beta blocker), pressure in my head, tremors, fatigue/low energy/lethargic, inability to think clearly/concentrate. I retain fluid (face, hands and legs), have gained about 25 lbs. They can t figure out what s wrong. It s been 3 years of this and I m slowly getting worse. I don t know what to do. I m tired of being sick all of the time. By 7-8 pm, I m so exhausted that I can t stay awake. I ll fall asleep wherever I am, like someone turns off my power switch. I sleep like I m a zombie until 3-4 am when I wake, shaking/tremors, sometimes fast heart rates and sometimes so weak that I cannot lift my arms or legs. They say my blood work is normal... I was fired from my job because I kept fainting and collapsing.