Keep an eye on it in a few days. Make sure what you deleted stays deleted. Multiple people have been reporting their posts and information being restored.
I'm not sure if actually deleted/edited comments are being restored (has yet to happen to me), but I know for sure that one thing can happen. If a community you commented was private when you did this, you wouldn't be able to edit or delete those comments. Once the sub goes public again, they'll show up on your profile, untouched by your mass edit/delete. Unfortunately there seems to be absolutely nothing we can do about this.