Okay, when I went in to my doctor today, he told me my pulse was 104 BPM. I have been sick (cough, fever, chest pain etc.) for a few days, but this worries me. Should I be concerned?? What could this be?? I am in good physical shape w/normal at 55-60 BPM. 16 year old girl at 5 3 and 113 pounds. Help?? 10 points best answer. Also, I have experienced many bouts of fainting in the past.. 6 times last year.