If this is not a new symptom to you then I would think you may have discussed it with your physician.
I understand your anxiety as many illnesses can mimic a heart attack and you start to become a cardiac cripple with severe Health Anxiety.
Do you have a therapist, if not therapy may be an idea to help you deal with this fear.
Please call your physician if you truly feel you need to, it is always ok to make sure your heart is not the problem.
Take care and keep posting.
Moderator Anxiety ~ Panic Disorders
*~* Not a mental health professional at all *~*
Dx: Anxiety/Panic, Depression
"If you doubt you can accomplish something, then you can’t accomplish it. You have to have confidence in your ability, and then be tough enough to follow through.”