usually when im at work i have a rapid heart rate... but i guess that understandable because i m always moving.. it s a restaurant and when it gets busy.. you literally run through the whole place. but when i get home and i m trying to go to sleep sometimes my heart rate is still up. i m thinking it has to do with the fact that i drink alot of coke at work to give me energy. anyways yesterday i went to the hospital because i have a really bad cough. and the doctor told me my pulse was 130.. i m 19. i don t know if that s normal... but it eventually went down to 100 again. today it s been 130 again on and off.. but i think i m just freaking out cuz it s been on my mind all day.. am i just stressing about it too much ? because I ve never felt dizzy, nor have I had chest pain. could it possibly be because at the moment i have an upper respitory infection ?