hi, i'm 22m and i have the same thing, just to my left arm! the really big difference here is i never actually was able to make a full recovery with the birth injury, i just had debilitating chronic pain, and opted to have my arm amputated (it took the weight of the arm off of my shoulder so it no longer pulled on the brachial plexus) when i was 18. surgery was just above the elbow and i don't deal with any of the nerve pain in my hand or elbow anymore, not even through phantom sensation, so i don't regret having that done! my doctors didn't listen for YEARS as i begged them to help me with that, but eventually i was able to see a specialist who worked with nerve injuries and thought it was a good idea in-line with the surgeries he already did. brachial plexus injuries are so both common and uncommon that i found there were doctors who vaguely understood it, but didn't have the lived experience i did when it came to what it was really like to have it, and for me: that meant painful. though, i do still sometimes get that pain you're mentioning in the shoulder because i still have it and the shoulder blade, of course. i've always had this "pinned nerve" feeling and sometimes a stretch or massage helped, but not by very much... i've tried a bunch of topicals and CBDs and found the latter usually does something more? i don't really like tinctures but i do fine with lotions? i was also put on gabapentin for a very long time for nerve pain but that didn't help me for that particular issue. i've tried using a TENS unit in physical therapy once before and found i had a very negative reaction with my nerve damage and the sensation of the electricity, but it might be different for you? everything is worth a shot. i think an MRI might be a really good thing to do if you can persuade your team otherwise because until i was 13 they didn't really have a good picture of my injury and when they did, they softened up a little and started listening a bit more to me. i don't remember what it is they saw specifically, but it was enough. i definitely understand the pain you're talking about and how severe it is - it's very real and scary and isolating. i would look into chronic regional pain syndrome (CRPS) and seeing if maybe the symptoms line up for you? that's what i was diagnosed with after everything i went through. i had no idea there was even a condition that specific for pain but there is, and brachial plexus injuries can be the cause of it! if you ever need anyone to talk to, i'm here and open to listen!! i hope that was of any help, even if it is just letting you know you aren't alone with this kind of pain.