My Pet Fish Can Read My Mind

So, there's this goldfish I got last year, Charlie. And yeah, I know it sounds silly, but I swear the fish knows when I'm stressed out or if I've been procrastinating on my work. It just swims around in circles and stops eating its usual flakes of food. Last week, before an important presentation at work, it even floated upside down for a minute like 'Oh no! What's gonna happen?' I mean, seriously, does anyone else have this issue? Is this normal? I don't know if I should start talking to Charlie about my problems or just toss the whole thing out as coincidence. Help?