I think I ate mercury?

Honestly, I'm no professional, but I'm pretty sure it's possible. I remember learning about it in environmental science about a month or so ago. My teacher told us about how like somehow mercury moves through the food web or something so bigger fish usually have lots of mercury in them. Tunas aren't THAT big but it's still a possibility. It isn't enough to kill you, though. Definitely not. But since I could be wrong, you might want to do some research..Hope this helps (: