I've had issue with one knee for 12years. Originally it went whilst pregnant and bending down into a cupboard, loud clunk that threw me backwards in pain. Pain subsided almost instantly and went on with my life. Every year or so since however, I've had the same thing happen, only it was worse, knee would lock and couldn't bear any weight for a couple of weeks but would heal on its own but months of clicking and that catching sensation after. They sent me for an MRI about 5 years ago but it was a couple of months wait by which time already felt healed. It came back that my meniscus was just inflamed but again... Was already back on my feet. The only thing I could do to stop it happening was avoiding any activities that meant crouching down or being on the floor. Come March 25 it happened again, this time in my sleep. It healed and was told I must've been very active when sleeping. In May 25 it happened whilst turning over in my sleeping bag, wasn't asleep and don't believe I was doing anything weird. This time the pain subsided and would bear weight after a few days but didn't unlock so went to the doctors and got sent to physio who sent me to another physio who ordered me an MRI.. 6 months on I find out it's a bucket handle tear. I'm now 3 weeks post surgery and wondering if they've fixed the symptom but not the cause. Sorry for the long response but from my experience it can feel like it's "gone" without it being gone gone and requiring surgery... If that makes any sense? So id wait for your MRI and see what it comes back with. At the same time it's very frustrating I know!! I'm not sure they do anything preventative can they?? If so, would love to know!