You may want to check with your doctor about this one. Are you worried or anxious? I know the first time I donated plasma, my dad was there and it made me very agitated (long story). This made my pulse rate high and I had to sit there for quite a long time before they would let me donate. You may also be getting too much caffeine from other places (tea, chocolate, lemons). Just a thought.
Question: Where did your quote come from? I know I have heard it before, but I can't figure out from where.
Two roads diverged in a wood, and I ---
I took the one less traveled by,
And that has made all the difference.
In my experiences with a high pulse rate, it's been the fact I have high blood pressure. I take medication for this, so not sure if that's part of the problem. I do know if you are under any extreme duress and distress, that can make it freak out too. If say, I am really stressed about my husband's incarceration or any other thing that's thrown my way, my pulse rate escalates, and I can feel it, it kinda makes me sick to my stomach if it's really high. Usually while I am at home, and its really going, I try and lay down for a few minutes and clear my mind the best I can, even if its temporarily.
Hope this helps, and you find a solution that helps you.....