Doctors say I'm a hypochondriac, but I still believe I'm dying.?

have a similar fear though i never went to the doctor i just tell myself its in my head so it doesnt drive me crazy but sometimes i still feel like i have it and its going to be too late you cant diagnose yourself with anything i used to take my pulse all the time i would think i was going to have a heart attack but all it did was scare me and make my heart beat faster feeding the fear you have to accept its all in your head especially if the tests were clear