According to my wife it's when a ligament or tendon pulls away a piece of bone. She then chatted Physio speak regarding treatment and recuperation. Hopefully a quick recovery for you.
I had something similar 2 years ago, turned out it was a stress fracture of my Fibula. Took me 3 months to get back to running again.
My wife is a Physio and she gave me a plan to get back to fitness.
Hope your Physio appointment goes well.
We also used https://nwp-online.co.uk/ for our pre flight covid tests and the ones on our return for the Passenger locator form.
Results back within 24 hours. Like @greys4life we're in Rugby and the test centre is 15 minutes from us (Bitteswell).