To check disks, put bike on paddock stand and hold a screwdriver on the edge of the disk, sort of 90 degrees away from it.
As you spin the wheel you should feel/see it move.
BUT..
it's got to be REALLY bent to move them that much... and If you didn't already notice this when riding, i'd be shocked...
Although i am struggling to think of anything else it could be as this is the only thing that makes any sense at all.