A lot of people use talk to texting so things happen. I've corrected mistakes only to see it messed up again after I post it.
There's some reason for it and it's not fixing itself. Get the tire off the ground and see if it's loose bearings. Rotate it back and forth. It could have brake parts mangled and clunking around in there.
You can buy a whole backing plate brake assembly for $50 to $100. If the bearings are trashed hope that they didn't tear up the axle stub. That would be the worst case and complete axle assemblies are available for surprisingly low prices.