Cankerous

I don't usually get them, so having two canker sores at the same time, one on each end of my mouth (one under my top lip, the other at the back of my mouth on the opposite side, at the base of my tongue) is making a pretty good run at ruining my week. The placement of the cankers is such that my entire mouth is off limits to sour, sweet, salty, and chewing. Which leave sucking down water through a straw for eating/drinking without pain...