Hello, sorry to hear about your injury. Unfortunately I’ve had too many similar experiences, and am proof that nerves are not fully understood, and cannot be accurately predicted as far as how/if they’ll heal, as well as other aspects.
I shattered my collar bone when I was 15 into about 9 pieces, absolutely obliterated. Of course I needed surgery to repair it. And after a month or two, when most of the healing process should have been complete and back to normal, I noticed that the entire left side of my chest and all the way down my left arm to about the elbow was very very screwy in terms of nerve pain and numbness. It’s weird, it’s like it’s numb, but also extremely extremely super sensitive. Certain types of feel cannot be felt, while others can be felt too much, and are extremely painful. Like I can feel if I have an itch in that area, but cannot pinpoint exactly where. And if I scratch where I think the itch is, not even very hard, it results in excruciating pain. Simple.scratching hurts so bad. But lightly running my fingertips along the skin can hardly be felt.
Also, I’m now 27. So 12 years have passed, and it has basically stayed the same.
When I was 22, I got into a very serious rollover car accident. Was going 85mph, on an on-ramp about to get on the freeway, and idk if my tire blew or if I just lost control somehow, but I tumbled down the side of the on-ramp, as there was a pretty good Hill on either side of the ramp, it was kind of raised up. But I rolled over a dozen times, about 14 or 15, or so they tell me. I don’t remember any of this. They had to cut the roof of my car off with the jaws of life to get me out, but I only remember waking up in the hospital.
Anyways, I was wearing my seatbelt, and each time my car rolled, my shoulder slammed into the side/door of my car. The result is and has been absolutely horrible. I had pretty much constant relentless pain, like lever 10 pain, for more than a year
They told me that the nerve under the shoulder blade, I believe it’s the axillary nerve, was stretched so much from hitting the car door each time i rolled that it just died, completely. Within a month or 2, all the muscle in my shoulder had atrophied and went away, leaving my shoulder all skinny and bony and sickly looking, especially when compared to my normal right shoulder. They also said that the seatbelt caused damage as well, essentially ripping my shoulder back each time I rolled, and Ive never found out what caused which damages.
I had ripped many tendons and ligaments, and tore my rotator cuff also, which only compounded the problems and was excruciating.
Anyways I had many doctors tell me different things, and try different things. Some said that the nerve will heal over time, others said that it’s possible it will never come back and that it might stay dead. Had some say I needed surgery to try to fix it, and others that said surgery would be a terrible idea and would only cause more problems. And some who said that it was my choice, that it may help and may not. So basically I had doctors who told me that each option across-the-board was the answer. Which had me feeling like no one knew what they were talking about. That was one thing that helped me realize that the body, nerves especially, isn’t fully understood. It’s been over 4 years from that accident and my should muscle still hasn’t come back, the nerve has remained dead. It wasn’t until maybe 2 years ago (roughly 2 years after the accident) that I stopped having constant round the clock pain. It still hurts, whenever I lift things, or especially if I try laying on it or wake up to horrible pain because I accidentally rolled over onto that shoulder. Because it has no muscle around it and because my rotator cuff is torn, my shoulder wants to pop out of its socket very easily, and has a couple times. It almost pops out just from turning my steering wheel. Takes not a lot of force.
Anyways those are the two main instances I’ve had with nerve pain, was told a huge range of different outcomes to expect, as well as different avenues of treatment. Left me feeling discouraged and not at all confident in medical professionals. And I had excellent insurance and was able to see supposedly some of the best doctors available.
So I don’t know what to tell you, other than hopefully you find a good doc who really knows their stuff.
Anyways, those are just two instances.
I could also tell you all about the journey and about the results from falling off of a 33ft waterfall, landing on a huge flat Rock, snapping both wrists, shattering both knee caps into over 20 pieces each, shattering my right elbow, and smashing my face, and some other injuries from it. That’s a long story that I won’t tell unless someone wants me to. 
Hope something I said helped, and good luck on your road to recovery!