Major knee problem

Been having some issues with my right knee lately and today it came to a head. Pulled the truck into the garage to work on my amateur radio antenna and when I stepped out of the truck something snapped in the back of my knee and if I hadn't been close to the Cuda to catch my fall I would have went down. I've had numerous kidney stones and 2 back surgeries and have 4-5 migraines a month but this pain beat them all. Hurt so bad I shook all over for about 10 minutes. Had to use a broom as a crutch to get to the house. That 40 ft seemed like it'd never end.

Wouldn't you know this would happen now as I have several jobs lined up. But isn't that always how it goes, lol...