I have had a bad shooting pain in my left arm for the past two days!! Woke up this morning and it's…

I have had a bad shooting pain in my left arm for the past two days!! Woke up this morning and it's completely numb... my fingers have no feeling. They feel like my circulation is being cut off!! Should I continue to wait it out or call my doctor?? I just don't want to go to the ER for them to tell me it's nothing... but the pain is getting to be unbearable! I can't do anything with my left arm/hand!!