Ok, kid. Take a long, deep, slow breath in. Exhale just as slowly, keeping it steady both ways. Keep breathing like that until it's easy. None of them were hurt. Now, when you've calmed down, start working on figuring out how it got in. Once you know that, blocking that path can be done. You may find other spots needing to be fixed in the process.
Having a Opossum get in as you arrived home was a good thing. You can fix it before the raccoons figure out how to duplicate the technique. NO ONE WAS HURT. Keep breathing.