Chiropractors and osteopaths are witch doctors. Find a good musculoskeletal physiotherapist. If you're in Wellington I can help point you to a couple.
If you have not yet already, you should at minimum have:
- seen an MSK specialist and had an MRI
- had bloods done looking for HLA B27 or rhuematic tracers
Don't consider a treatment provider until an MSK specialist has diagnosed your condition fully, otherwise you could just be throwing money down the drain. If you have had the above then make sure a MSK specialist has looked over the results, not just the GP.
From my experience I spent a long time at the docs getting nowhere, and only once my new MSK physio pushed for a referal to the MSK specialist did I get the diagnosis and it ticked all the boxes of all the symptoms I had that I thought were unrelated (one I wish I had received years earlier so I could have slowed the progress).
I'm not bagging GPs, but i've long ago learnt that you need to be proactive in seeking out proper diagnosis.