Hola, did you already apply for OMSAS this year? If you have, the 9 won't kill you. U of T takes 9s. But queen's and western are more stringent. And I know that Dalhousie will take a composite of 30+ and will excuse a 9 in a section. p.s. Dalhousie's application isn't due until Nov 2nd.
But, if you haven't applied yet, then a re-write doesn't sound too bad. You can bring your VR up, and also ace the other sciences.
Good luck. It all works out in the end 🙂 Just gotta have faith in God and do the best that you can do, and make a positive difference any way you can while you're at it.
Best,
AG