My daughter has the same problem...it is a form of anxiety
. Please see a counselor or tell your physician and let them know it is really AFFECTING your life...there is treatment, and ways to combat this. Please don't wait, it will only get worse and you will just kick yourself for waiting when you could have gotten relief by learning relaxation techniques
from a therapist or even if it is sever enough there is medication that can help you through this time until you can handle it on your own.