Hi i am a female 18yr old in college! I use to be healthy and did a lot of physical activity! One night here at school i was sleeping and about 4 something in the morning i woke up with heart palpitations and trembling. The next day i felt very weak and the trembling stayed and i was lightheaded. That went on for most of October. As of now the only symptoms i still have is the constant palpitations throughout the day and the inner trembling NEVER went away sometimes it keeps me from sleeping and my symptoms get worse at night. And i still sometimes get lightheaded. I havent been diagnosed with anything. Thyroids were normal, CT of brain was normal,EKG was normal, Holter Monitor was normal, somebody help me please i want my life back and i feel like im losing it:'(