Teacher,
I am sorry that you are feeling this way...not the way you want to spend a Friday night! :(
Here's some more help from our Resources.
Self Help for PVCs
http://heartpvcs.com/pvc_cures.htm
http://heartpvcs.com/long_term_pvc_cures.htm
Remember, these are benign, and could be the result of anxiety, fatigue...even something you ate/drank.
They will pass!
Feel better soon,
S.C.