Why haven't you applied for Social Security Disability? Your lawyer sounds like they are making you do all the leg work. This may or may not be a Worker's Comp. ailment and you are running out of options. I would get a Social Security lawyer and file right away. You will be declined on the first review, everyone is, but the second time around you may be eligible.
You should not go out shopping didn't your lawyer tell you to curtail your outside activity? The Workers Comp insurance (if it is a private insurance company) sends investigators out to follow you, if you do much more than doctors apps. and picking up scripts you are doing too much. I am telling you they follow you, they film you, they are unrelenting. They even knock on the door and pretend to be Jehovah Witnesses to gain entry to see how you are doing.
I am sorry that your family is not supporting you at your time of need. I will pray for you and your family. I know the route you are taking and it's really hard. Find a good doctor and stick with that doctor it may take a lot of time to find the one doctor that will really listen to you. Took me about a year for confirmation that I had not only arthritis but fibromyalgia and just a little depression. By that time surgery was a necessity and I was in the operating room 2 weeks after my app. with the neurosurgeon, my L3 nerve root was trapped at the L4 level, and I had severe spinal stenosis. I lost my job, a great job I had, I loved it but just could not do it. I had a desk job with travel and it became too painful. Again, I am sorry for you and you have my prayers and encouragement.