hello,I wanted to ask a question, for a few years now, i have been light head, dizziness, fast heart rate, gain and loss weight easy. My light head, dizziness, fast heart rate is about almost every day, all day. Also most of the time I can feel and hear my heart rate. Sometimes it get worse when I exersie. Also my weight loss and not so much weight gain, has also went on, I am about average for my weight and height. Once I droped 10 pounds in less than a week, then gain most of it make back. I ve been the same weight area for about 2 1/2 years. I didn t now if this helps you, but i need to stop feel light head, dizziness, fast heart rate.