Pregabalin has helped me a lot with pain from fibromyalgia, has toned down my OTT pain responses and made life much more comfortable. It also helped when I had it increased when I was getting horrible shooting pains as a side effect to my arthritis meds. I do sometimes wonder about cutting down on it but I'm worried that the withdrawal effects would be horrible and I'd realise how much it is helping and I'd gain even more weight with it by having to go back up again.
I had accupunture via physio at my hospital and it was good although it did provide relief but not a cure as the pain would come back, some relief for a while was lovely though. It seems my pain around my shoulderblades is caused by inflammation underneath them though due to rheumatoid arthritis so it figures the pain will just come back. I've now been told that I could have steroid injections there (already have my hips and shoulders done and general ones) to help and I've adjusted a lot of what I do so as not to aggravate it. Doesn't help I've got impingement in both shoulders too though.
The weightloss thing is hard if you are not very mobile and restricted in what you can do. I don't eat badly but had put so much weight on with the lack of mobility (used to be very active), pregabalin, mirtazapine (to help me sleep) and steroids. It makes me feel horrible but choice wise I choose not to be in so much pain.
Could you get a referral to a pain clinic, see if they have any new ideas to try? Do they know what is causing the back pain?