Had very slightly same thing as you, doing very well at rugby had trials for england coming up and was hopefully signing for saracens rfc. Basically due to too much training i broke away the cartilage in my talus, this then started to grind up into the tibia and started to break that up, used to be agony but never really took much notice, even when resting. After a load of physio nothing was working, had an mri scan and all became apparent.
After 6 hours in surgery and 12 holes drilled into my ankle it was sorted lol, but could not walk for almost 3 months. Agony to start with. Has taken me almost 1 year to get back to normal, no more rugby for me. I know does not compare to you mate, but in time it will get better. Just do not rush anything.
Sorry for long post.