The knees are so important.

I hope everything will work just fine

next time something like this happens, use a plastic ring holder, its what i used to do when i had piercings, they sell them at most tattoo, piercing/head shops. Its plastic with special retainer rings to make sure it doesnt fall out. Hope your tests went well

Hope the test was ok.

second the plastic retainers/ring holders...

and hopefully the MRI was a step in a good direction - have a co-worker whose knees are now bone-on-bone and he's in pain daily...