It popped on its own and is healing already! I still don't know what it is, but it is getting better so hopefully it is just some silly little odd cut and she won't get anymore! Thanks for the replies, I know it is silly to freak out over every little thing, but I'd never seena round cut like that and didn't want to just leave it if it was something serious. At least it'll heal up just fine, that's what I care about most!
~He knows when you're happy
~He knows when you're comfortable
~And he always knows when you have carrots.