question: When I wake up, my heart normally beats unusually fast, and I get short of breath. I get dizzy when I stand or sit up, and am normally weak to the point where I dont want to move. Other times, I cant even feel it beating. Im 16. I used to be a cross country runner and sprinter. Im always tired, but I can never ever sleep. Ive been diagnosed with Severe Depression, Anemia, ADD, and Insomnia, but they still cant figure it out. Any theories?