Belated happy birthday @drivinmecrazy 
You have my utmost sympathy, it's hell isn't it?!
Mine started the year I turned 50 funnily enough but I already had tennis elbow and a knee issue at the same time which, in hindsight, was mistakenly given priority. 2017 was a write off for anything other than medical appointments.
I tried physio, osteopathy, acupuncture (bad decision) and the only thing that gave me any relief was two separate steroid injections at the hospital. At the worst stage, I was maxing every painkiller I could just to function.
I burst into tears at one physio session where they refused the second steroid jab and I remember them asking kindly if I thought I might be depressed. I said no, I'm just bloody exhausted from constant pain and getting no more than 4 hours sleep for months on end. As @DontCallMeBaby says, amputation sounded a reasonable consideration at the time.
5 years on I don't quite have full range of movement in that shoulder but there was an underlying impingement issue prior so I can accept that.
The one thing that helps for sleeping is to lie on your good side, take a pillow, fold it in half and tuck it under your bad arm in a rugby ball hold. I still sleep like that.
I also carried an inflatable cushion everywhere in case I ended up in a seat without an arm rest.