I am a female, 34 years old, 165lbs, caucasion, 5ft 7inches tall. For years I've had a dull ache or pain where my heart is. Some times I go months without the pain, or I just don't notice it. During the times I notice it most, I notice that it feels as if my heart skips a beat, and in that instant, I stop breathing too. I have no other symptoms that go with it, except I do feel tired alot. Should I worry?