I understand what's going through your mind right now, but there are a couple of things to keep in mind.
The first is that in any process like program or scholarship applications, there is a lot of luck. It can sometimes be hard to tell what your chances really are because it often depends on who is reading your application and what the competition is like that year.
Secondly, the criteria for these applications are all different, and the applications themselves are all different. Just because you didn't make it into Shad, does not mean you don't have a shot at Loran/TD. Apply! What do you have to lose? Apply, apply, apply and hope for the best. I understand it affects you psychologically, but try to forget the past and focus on putting your best foot forward in the future.
Thirdly, it's not just about your resume - it's also about how you present that in the application. It is probably worth reviewing your Shad application with say your guidance counsellor/family/friends to see where there might be room for improvement in the way you present things on paper.
Good luck, and keep your chin up :)
TD Canada Trust Scholar 2006
University of Toronto M.D. Candidate, Class of 2013
MedHopeful.com - my blog with advice and entertainment on undergrad, scholarships and medical school.
Get Started - an introductory guide for premeds to learn about applying to medical school.
Mac Health Sci Application Guide - my advice for the McMaster Health Sciences supplementary application.
EssaySensei.ca - where I provide 1-on-1 essay help for applications to medical school, scholarships, awards and programs.