I have some experience with it, as a patient, not a medical professional, so keep that in mind.
I did part of my inpatient and day rehab at one of, if not the, best spine injury centers in the US, and they said that with nerves, it's a matter of time, and a dash of luck. Nerves do seem to heal, but it is very slow and can take a very long time. As another poster mentioned, they don't always heal along the original pathway, either. For my injuries, which are quite different from yours, they said I could expect I'd make the majority of progress within 18 months, and that it would be slow and incremental from there, and I may/likely won't be "the same".
For me, I had numbness of the left upper jaw (so my teeth were numb), I had extreme touch and general sensation sensitivity in my left forearm and hand, my thumb, forefinger and pinky were numb, and the pinky-side of my hand was insanely sensitive. Like I couldn't let the hairs brush against clothing because it was painful. I also had significant weakness in the legs and posterior chain, and still have significant weakness in the left arm and hand.
In time, like several months, the numbers went away and feeling came back in my jaw.
The majority of sensitivity in my left forearm and hand is gone, and feeling has returned, though some sensitivity to touch and hot/cold remain, as well as weakness. This has taken the longest to improve, and hasn't made notable progress in a couple months.
For me, and what I'd suggest to anyone dealing with a similar condition, is to take PT/OT as serious as possible and work as hard as you can. I worked as hard as I could in PT/OT and continously pushed my limits. These initial couple months are absolutely invaluable to your recovery. Do the little things you may not think matters; you have a leg injury, when your sitting or laying in bed, simply squeeze your glutes, quads and hamstrings, repeatedly, for as long as you can. My idea was to move my muscles and innervate the nerves as much as I could, and I did this for hours on end, day after day, before formal PT even started.
Eat well! Nutrition is essential to your recovery, as is sleep. Sleep well, sleep often.
Are you on BPC-157 or TB-5000? It sounds like you found a cool doctor. I was a training powerlifter before, and was begging the ER docs for Nandrolone or Anavar to preserve lean tissue (I was bed-bound), and they refused.
Anyway, sorry for the novel, and I hope the best for your recovery. If you have any questions, I'll answer whatever I can. Feel free to DM me also if you want; I know dealing with this kind of injury is exhausting.
Work as hard as you can, and do not give up.
