Swollen Area On Tongue. Brown Dot In Back Of Tongue. Anything Serious?

Wondering whether to visit a doctor. On left side of tongue, there's a thin swollen area just where the tastebuds start to disappear. Not sure whether this is different than in the past. I know the right side tapers off, but left side raises a bit before "dropping" (to visualize, just imagine the tongue sticking out horizontal to the floor). At the end of this raised area toward the back of the tongue, there's a tiny brown dot. If my mouth is completely relaxed and I close my teeth, this is the very area that would get bitten as my jaw is slightly shifted. Maybe I bit my tongue during sleep, but I hear that brown dots and swollen areas could be something more serious.