while there are certainly some physiological reasons for the symptoms you are experiencing, however there are also some significant psychological ones. when we experience pain and frustration it can often result in a spiked heartrate or other physical complaints.
the stress of crps wreaks havoc on our systems. when those symptems present dont treat them like random occurances instead consider the mental roots that may be the cause of the problem.
this is not to say it is all in your head, it most certainly is not. i simply meant that far more often than we can recall the physical and the mental blend and often times the results are frightening.