I'd say wait and see if you find any other holes. IMO, that hole looks oddly symmetrical to be bug damage. But it doesn't looked burned either? What's that stuff to the upper right of the hole? If it's just a dried hard water spot, okay. But that does sort of look like leaf hopper "spit". If you don't see any more holes, you're probably right in that it was something you did (pulling through the screen perhaps?). If you do see more holes, check under leaves, look for more "spit" and update us. There are ways to nip this in the bud, so to speak
Good luck
R2T