Hang in there. I was chronically injured last year and spent way too much time in physical therapy. I did not run at all or do anything that put weight on my foot from about a week before Halloween until Christmas. It was mentally very tough. I know we have different medical conditions, but at the time I was dealing with injuries that were just healing very slowly due to malnutrition. It took a long time after I stopped eating gluten for my body to fix things. I had multiple injuries in the same foot. It was pretty bad.
Do you have any access to a pool? I found pool running to be a great substitute for running. I kept the cardio up well enough that despite ~10 weeks with no running, I was able to complete the Princess half marathon only a few minutes slower than the year before, so I was pretty happy.
I can't remember exactly what was going on with your foot, but I seem to remember something going on the outside? Has your pt said anything about kt tape? It helped so much with my recovery. I had a bad sprain that swelled all the time, plantar fasciitis, achilles tendonitis, and tendonitis around the sprain. I had a lump below my ankle that never went away. Anyhow, even after I could run again, I wore kt tape for a couple of months. I also highly recommend the tree poses with movement if you are not doing them. Really strengthened things back up.
I honestly believed I would never run again without pain in that ankle. The sprain happened in May and I ran on it and ignored it for months. (yes, very bad choice). I also had a fat pad injury in my heel. I thought I was stuck with foot pain for good. And while it is not perfect now, it is definitely manageable.
Sorry, for the book. Hang in there.