Chronic severe shoulder pain !!!

My husband has worked very hard for seven years at a highly physically strenuous job, and over the past two has encountered severe shoulder pain. He's the type of person who will "tough it out" despite any pain, but five months ago it peaked, and he went to the ER. He describes his pain like a vice queezing his right shoulder constantly, getting worse if he uses his arm for any reason or lays on it. If you even touch his collarbone in a certain area, the first two fingers on his right hand go numb. He describes pins and needles in both the shoulder and fingers when used for anything beyond laying limply.

He eventually took himself to the ER, who sent him to an orthopedic surgeon. There he received an MRI, x-rays, and was sent to a neurologist and physical therapist. The orthopedist ultimately said that the numbness in his fingers was a product of carpal tunnel syndrome, and even went as far as to say it was in BOTH wrists, because of the existence of a scar on his LEFT arm. The physical therapist actually laughed at that, and said there was absolutely no evidence of CTS. Still, the orthopedist actually said, "You're too young to be experiencing symptoms to that degree," and to, "Go ahead and try working, come back to see me in three months," totally dismissing his pain. He did go back to work on light duty, and just riding around in a golf cart for three days made his pain worse than it had been before. We heard from other patients that this orthopedist had a bias against workman's comp cases, so we sought a second opinion.

The MRI showed a deterioration of cartiledge around the AC joint, indicating osteoarthritis, so the new orthopedist tried administering cortisone shots for two months, with no pain relief whatsoever. Other pain medications haven't been able to hold a flame to his pain. The orthopedist then concluded that the cortisone would have helped if the problem was anything he could help with, but once again, another doctor was saying he was too young to contemplate the surgery he was hoping to get to alleviate his pain, that he "wouldn't feel right" doing it, and that the procedure probably wouldn't help with his pain, anyway.

I did some research online, and have come to suspect some kind of nerve damage in his shoulder. He hasn't slept on his right side in ages, and can't even lift a jug of milk without dropping it in pain. It's been five months of this consistenly, and it took all this time for the orthopedist simply to say, "The pain and numbness are not within our realm of understanding." All this time, his pain hasn't diminished at all. Now they're telling him they don't know, so go back to work, and I'm deathly afraid that he is going to injure himself further. I can personally attest to his daily struggle with this pain; it's driven him to tears on more than one occasion, and he even mowes our entire lawn with one arm. He's an extrememly hard worker, and that is why he is in this situation. The irony of it is, by going back to work right now and saying all the time off was inconclusive, he looks like he was just faking to get out of work, when he is the most dedicated person to it, and the last man on earth to even THINK of anything like that! He is stir crazy being out of work, but we don't want him to go back unless we're sure he's okay, and he's not. This pain is caused by something, and we're desperate for anwswers. Our infant daughter is due to be born in 8 weeks, and I just want him to be able to lift her when she's born. Please help- is this nerve damage? What can we do?