Canker sore just keeps getting bigger?

I understand what you are going through. I get canker sores pretty often ( I have a 16 month old who like to head , and he usually catches me in the mouth.) When I start getting them, I sart eating yogurt. I'm not sure what it is that is in it (enzymes or whatever) but it seems to help mine. Also, I'll use camphophinique ( I think I spelled it right). It comes in a little green bottle. It'll burn like crazy but it seems to make them heal up faster. I hope this helps and you find some relief soon.