JD. Hey man. Where are you located? Anyway... my CHEK practitioner assessed my primal movement patterns such as, walk, squat, bend, etc. Assessed the function of my TVA (internal abdominals) overhauled my diet, etc. I too am in my late 20's, I just got an early start on the injury bug.
I am also a client of Paul Chek's, founder of the CHEK institue, so I'm probably a worst case scenario. But I'm glad if you can use anything that I say. But for me the first thing my practitioner changed was my diet. I was put on a 4-day rotation diet where I removed gluten (protein in process grains that can inflame your gut and mess up inner abdominal functioning and digestion), and rotated my meat and vegetables every 4 days.
For me, and this is just me, I gained 20 lbs of muscle doing correcive exercises for my shoulder (not bodybuilding but functional exercises). Not much weight was used either according to what I used to lift bodybuilding. I don't know if it was the gluten, the rotation, or what. But it was obvious that what you eat can have an enormous influence on your body, as well as it's ability to heal. THose types of results had me immediately realizing this path was something to follow a little more.
Anyway, the check practitioner would also assess your posture, and any other orthopedic problems (which he might refer you to a specialist for such as if you had developed a pattern of anterior instability in your shoulder), and then create an awesome corrective excersize program for you. A lot of the exercises might be new to you (even if you've been on this site for a while), but man did mine get results?? Absolutely. I am not sure if a level II practitioner can help you or not.
My practitioner is very honest. I think that is something they stress in the CHEK program... Let him know your situation, and whether or not he could help you. If he can't, call the nearest CHEK III and ask him. I'm 28, and used to weightlift 5 days a week approx. 2 hours a day. I wanted to lift more weight, get bigger, etc. at the expense of form. I didn't discover this site until after I injured both shoulders. It makes me cringe when I see guys like the deisel weasel doing zurch squats. I feel sorry for him.
One day it will catch up with you, and then you have to go down the path I'm headed . I can tell you right now that I've gotten more from my chek practitioner than anything I've tried in 4 years. Paul Chek has a few articles on here. They are real technical and scientific, and my not seem like that have application in the bodybuilding world. But he is in the corrective exercise business, not bodybuilding. I'm glad T-mag is a forum for both types.
However the deadlift (concentrating on form) and squat were 2 core lifts in my program, mainly because you have to stabilize the spine during the lift and it integrates your kinetic chain as well as strengthening muscles that improve "posture". I have tried a lot of stuff man, being in pain sucks as you know. Can't do what you want to do: lift. I think a ot of bodybuilders are in that boat to some degree... some quit, but you sound like you ain't quitting and that's why I replied.
You can probably do a lot towards achieving an overall better physique while modifying your program. For me I had to get over the fact that I couldn't do the traditional bodybuilding (really powerlifting) lifts like bench any more. For me, that was and is hard. I ain't no HYUGE T-man any more, but I still run about 170 at 5' 10" with about 5% BF... and that's more than I got doing a lot of the bodybuilding routines I've seen.
You can do a lot on your own, reading this site. But with something like you've got going on, I definitely wouldn't try and fix it yourself, because you don't have to. And your chances are better when working with someone who might have seen something just like you before. I hope that you make some progress man. The comeback road is a tough road, but you'll learn a lot. Hope some of this helps.