Hey there! I worried about the brain-eating amoeba for years
after my mother told me about it (though she too was a hypochondriac.
) I spent my entire childhood living in fear, so I have a pretty thorough understanding of this nasty thing.
You have to pick it up from somewhere, and while it can enter through your nose after doing something like swimming in unclean water, it doesn't live there (or in your throat, for that matter.) Keep in mind that it's also very, very rare. From 2003 to 2012, only 31 infections were reported in the U.S. I'd say you're fine, just don't Google it! That's my weakness, too.