I know exactly how you feel! My panic always begins with a racing heart. I am always aware of my heart rate and it makes me insane!! Yesterday for instance, I was having a pretty good day as far as anxiety goes and after lunch, I noticed my heart was beating pretty fast. I took my pulse and it was 100 and I just freaked! I keep telling myself that I should proud of myself because even though I was seriously freaking out, I made myself stay at work, I made myself go to the bank and stand in line for what seemed like forever, I made myself make dinner for my family and I stayed with them and ate and watched tv. I did lay down for awhile in my bedroom to try and calm down after I got home, but it is still with me today! I woke up feeling anxious like I do most mornings and right now my heart rate is probably in the 90s. Who needs coffee when you have anxiety?! (I miss coffee) I hate feeling like this!!!