Going back??? Already!

I don't want to go back to work tomorrow. I don't want to go back there ever. Is it possible I now have a phobia or an anxiety disorder just from working there? Would be just my luck. I am trying to keep my mind off it, but with 30 hours before I go back it's really starting to stress me out. Not a good start at all. I worked out it will take a whole year before I get holidays again.... not good.