Haha, no way. I've had a canker sore for the last couple days now, and I waddle over to ATOT and find someone else with a canker sore on the first page!
Mine is placed in a very inconvenient spot, right at the spot where my pointy teeth meet my lips, so everytime I talk or eat, my tooth pokes into it.
What I've been doing is just gargling with hydrogen peroxide. Stings a little bit, but it's the good kind of sting. The sting that feels like the sore is deflating and spewing out gaseous bubbles. After you're done gargling with the peroxide, you have a good hour or two of pain-free mouthing.