Thanks for the posts! I know what you mean about hypervigilance. I feel like I'm getting the palpitations now from anxiety and lack of sleep rather than the original culprit of caffine and smokes! Its so very difficult to just not think about it and to not be constantly paying attention to every feeling inside my chest. I've been down this road before with different aspects of my anxiety/panic problems.
My aunt told me that her heart palpitations started when she was about 29, so did her panic attacks for that matter. And, my grandfather apparently brought himself to the hospital many times in his life for heart palps and PVC's, only to be told that his heart was as healthy as they come. I have a fun genetic line to thank for these things. Knowing this family history alone should help me stop worrying, but that as you know is easier said than done. I will look into the magnesium, I've read everywhere that it helps with heart palps so I will definitely give it a try.
Thanks for the support! Shelly