I am a 34 year old woman, in good health, except for being overweight (which I am working on through diet and exercise). Lately I have been experiencing what I think are heart palpitations (either a fluttering feeling in my chest or, other times, feeling a strong pulse in some part of my body - temple or arm or stomach, etc), but (based on either taking my pulse manually or using an exercise heart rate monitor) there is nothing seemingly abnormal about my pulse - resting HR varies from about 57 to 67, and if I've been active just beforehand, near about 78-81. I also get headaches, a sort of foggy brain feeling like I can't quite concentrate properly, knots in my upper traps which cause pain in my neck and sometimes down the back of my arm, and occasionally a fluttering feeling in my upper stomach. Is this all just anxiety? (I have been treated for generalized anxiety disorder in the past, but have not had problems with that for some time.) Or are these symptoms something to worry about? I just had a physical and am waiting for blood test results, but my physician seemed to think there was nothing wrong. I'm getting scared because these feelings won't go away. Mostly, it's the palpitations that are so frightening - I'm young and don't want to die from a heart problem! Thank you!