The problem with disease IDs (in the same light I remember a sexually transmitted disease workshop they hauled us teachers into one time) is that they show the really terminal, well developed cases on the fish (or people in the case of that workshop).

Most of us will spot something on a fish or ourselves long before it gets very extreme. That may be why identification is so difficult.

And in the case of the images of Mycobacterial infections on those fish, they are "goners" anyway.

I think you are wise to be concerned asnd if it persists, get it checked out. The likelihood of you being infected is pretty small. If you were infected, the likelihood of you being cured, I would think, is very great.