Good points Greenbelt9
I second that, if you in anyway feel the injury, don't race or at least don't push through it ....there is always another race and this will be just a learning experience.
Same goes for illiness, last year I trained hard for 6 months, then race day I was sick as dog in bed with fever, but my kids/wife had planned to see my big race.
I dragged myself around the course, and patted myself on back for it ...but, the rest of my entire race season was shot, I never recovered fully......so, its just not worth it!