Hi PP,
I had a miniscectomy in April.
Listen to your physio. Great advice.
I built my knee up little by little with cycling (after 2 months) and power yoga (about 2 months). Don't push yoga, do what you can not so it hurts, but the results were fantastic!
I didn't run for 4 months. Seems a long, long time but better that than never being able to run again.
Think about getting new trainers. Your body has changed a lot suddenly. I use Ascic gel trainers. They are fine for me. My running shop were really helpful.
Take it easy and good luck. I am now almost 100% better. Did 10k in October and a 5k Sunday - snow willing.