Hi Cindy. Do you still work with the same Employer? How long until your WP expires?
As I know, you can leave Canada for holidays, but your WP doesn't give you the re-entry. It depends of the Immigration officer. They may ask you why do you want to comeback if you don't have a job or your WP is expired. Also depend of where are you from you might need a entry visa. I applied last year on june for my OWP and after that I went for 3 days to USA (on summer). When I came back they didn't ask me many questions, but I din't want to take a chance going again on December because my WP expired April and didn't have a job.
Good luck!