From the past 6 months, I am suffering from some heart related problems. Multiple chest pains a day, palpitation, shortness of breath. Of these, shortness of breath occurs only when doing some exercise. But I can get a chest pain at any time. I consulted with my GP and got diagnosed that I have had heart murmur. After that I took a complete blood test along with thyroid, which seems normal in all. I went to some other GP, who told me that it is related with heart and got referred to a heart event monitor. It also had normal in results and my GP told me that I am imagining it. Anyone can see that my heart is pounding very hard. I use two heart rate monitors, of which one is an expensive device with ecg accuracy. They also show a normal of 80-90 beats while resting and about 100-140 while walking. Sometimes it went as high as 200 to237 while walking gently. I am in my wits end that I cannot work well now-a-days. I am a 26 year old guy with normal weight levels. Now I am in a state of despair and insanity. There is no history of any heart problems in my family. Why this happens to me? Please help.