im right there with that person. i test once every decade or so. i agree reading/watching on the internet can cause a lot of oh boy, does my fish have that, or whats wrong. most things that go wrong with fish will be very clear and visible to a person quickly without watching them under a microscope. if you look hard enough for something wrong, you are going to find it, real or not. best for a person to just step away from the tank for a few days. feed them, and walk away. 99.999% of the time the fish are going to be just fine. you just have to allow yourself to be okay with that.