I have never had oral cancer but i'm a bit paranoid right now and could use some help. The night before last i thought i had a canker sore on my tongue. A bit painful of course but nothing that wouldn't go away on it's on within a few days, but the next day instead of a canker the left part of my tongue near the tip was swollen. Like when i gently press it or bite down on it it isn't squishy like a normal tongue it feels like there is something there and when i press the left side of my throat it hurts too. It hurts to eat and chew because when things brush against my tongue it is like this sharp bitter pain. Should i be concerned?