Bootcamp Problem PLEASE HELP

So i went to setup a partition using boot camp assistant i put i want 140gb for windows and i started it, it was taking a longgg time like 3 hours and it wasn't moving so i quit it and i had to restart my mac by holding the down power. When i got back to my desktop, i went to boot camp partition and it now says the startup disk doesn't have enough space to be partitioned. I checked and it says 14 gb free on the bottom of the finder window. What do i do now?