Numbness and burning in my left arm. Help?!

In my Anatomy class this morning, we were testing blood pressure, and we were using blood pressure monitors (haha, obviously if we're testing blood pressure).

When my group was testing my left arm, the entire thing turned purple, and I started to develop these odd, hot pink splotches along my wrist. It took about five minutes for my arm to return to it's normal color, and it was twitching for a fair bit of time afterwards (I'm normally jittery, but this was much more severe than it usually is).

Now, I had just been thinking that it was the normal cutting-off-of-your-blood-circulation symptoms, so I didn't worry about it very much and decided not to go to the nurse. This was all about ten o' clock in the morning.

But, now it's twelve hours later, and my arm is still very heavy and numb. I occasionally get a burning in my forearm, and I've been feeling nauseous for the last half hour.

What I'm wondering is if I'm worrying too much about this, and should just ride it out, or if this is abnormal. Should I wait a couple more days and see if this goes away, or...? Any help would be appreciated. Thanks!