Hey,
What was your GPA in %? Your letters are very important, so if you're not sure how good they are I would maybe suggest applying to more schools. What about your writing sample?
I am also a Canadian applicant, and I also applied to UWO and U of T for the MA (and two other schools). I received an acceptance from UWO over a week ago, but I'm not sure whether they are making more offers. If not, you could still get waitlisted.
I had an 89% average last semester (90, 90, 90, 86) in fourth year seminar courses and similar grades in my third year. I worked on my writing sample with one of my letter writers over the summer, and all three of my letters of recommendation were likely very good. I have not heard back from other schools yet, though.
I hope this helps!