i have this chronic, sharp, stabbing, gripping pain that occurs on and off for a week or so and then goes away for months at a time. it is horrible. it feels like my heart is spasming, although my heart is not located there. if i take a deep breath, it gets worse, and if i lean forward and stay still it is controlled. i have had an ekg and chest xray that were normal. does it sound like a heart problem? i've been told it's anxiety, but i have had it for years even before i had anxiety problems. and it will strike even when i'm not feeling anxious at all. anyone had this??