i gave this girl oral sex 3 days ago. the next day, i developed a sore under my tongue and kept thinking it was herpes, and looked it up. i found out it may be a canker sore, but i'm not too sure. it is a bump about the size of a pea and white colorish. because it's located at the bottom back of my tongue, it's quite irritating.

is it possible to develop a canker sore after having oral sex?