How to keep up the weight loss when living with an injury?

I (33/F/227lbs) have been trying to turn my life around for the past couple of months now, and was doing super well until I got too cocky and did way too much running before I was ready 😅 Tried it once on a whim, was pleasantly surprised when I could actually do it, so kept going. Both knees vehemently disagreed with this and now, on day 11, I can still barely walk 😭 (Yes I’ve seen a doctor and a physio, both prescribed Naproxen and the RICE method.)

Because of this I lost motivation and have been eating junk for a few days, definitely a ‘fuck it all’ attitude and I want to snap out of it. Has anyone else been through similar, and if so, any tips for getting back on track?