Awe, I'm sorry to hear that. I know you were wondering what the outcome would be from the Dr.
But, better to heal up and to come back strong next season. At least it's at the end of the year.... right?
Yea, when I first started riding I had some accute knee pain from the bike. A fit, new pedal that allow float (my foot can move while still clipped in- Speedplays) and focusing on a cadence of 90-100 fixed my knee pain.
Good luck! Keep swimming and do what the Dr. says... and you will be good to go next year!
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"