I was diagnosed with bone marrow oedema in knee 2012. It had caused a slight fracture so was put on crutches 6 weeks . When came off crutches I then had more problems, but with knee & foot, which later impacted both knees. Anyway, I was put back on crutches again, & this time stayed on them another 6 months, even though there were no further fractures. I became very depressed & like you I wondered if I would ever walk again. I found it very difficult to find information & I felt my Dr was keeping me on crutches too long as I was experiencing further problems because of them.
I moved to another Dr (consultant) who said crutches were just making situation worse, so he told me to get lots of physio & slowly, over several weeks I began to get stronger & more flexible. I also began to do some light exercise at gym & some swimming/walking in the water ( as non weight bearing).
I later had a bone treatment in hospital called Bisophonate I think. My confidence and strength grew more & more, but I had to exercise a lot to keep flexible & strong.
With hindsight I would say I should not have been on crutches so long & i I don't know whether the condition has gone as I am now careful not to walk too far or do too much, but I do now have a normal life again, and I am so very grateful for that.
Please try to exercise, but take it slowly. I now do believe the condition can heal but it can take time. You will learn to manage it yourself after a while, and get back to a normal life again. IF it does go on for months, ask about Bisophonates via IV, but try to manage yourself first.
I do know just how you feel, but you will improve (perhaps you have already?)