Yes indeed... stress is a very powerful force. I didn't realize the havoc it could cause on one's body until recently. I've had a large number of symptoms myself... and it seems they'll come and go in waves. For a period of time, sometimes a few days, sometimes a week, I'll have strong lightheadedness/dizziness, tingling, numbness in my fingertips, etc. The it seems the symptoms would shift. For a few days, or even a week, it would be strong stomach pain, acid reflux, chest pain, heart racing, which of course would cause my blood pressure to shoot up.
Now, I've never considered myself a hypochondriac - if anything, it has been the exact opposite for me. I'd get very, very sick, and it would take nearly all of my friends and family to force me to go to the dr. I went through many flu viruses with 103* fevers, without ever seeing a dr. So, when these symptoms first surfaced, it seemed logical to me to look them up via Google and try to treat them myself. Ha, big mistake. I think I can partially blame Google for any hypo I may have. Everything pointed to a serious life threatening illness. Like others, the more I read, the more intense the symptoms became, and new symptoms seemed to materialize out of nowhere.
I'm not sure if science has ever figured out why the brain goes on this symptom rampage when faced with tension and stress. I have read that the brain does react to it at times by entering 'fight or flight' mode, which would explain the heart rate, blood pressure, and numbness. Maybe if it stays in this mode long enough, and uncontrolled, it leads to the enhanced and varying symptoms we experience. Hmm, could be worth reading up on - I might have something to do on my days off.