Exhausted and exasperated

I have osteoarthritis and fibromyalgia (a lovely combination). I have had both knee joints replaced and my left shoulder too. I have “marked” OA in my feet and just had an injection in one. My back is painful whether I sit, lay down or move. I’ve found it almost unbearable when I swim. My hands and fingers are affected too. I have little grip and my fingers do not straighten. I have paid for physiotherapy and acupuncture too. My GP seems uninterested and has not made referrals. I paid for the last one. My physiotherapist was really worried about my back and suggested to my GP a scan before further exercise. The letter was ignored initially but an MRI scan is now set for mid January 2025. Almost 4 months after the physio request. I have also had cancer and having seen an early scan some 4 years ago which indicated spondyotic changes and severe narrowing at C6 and patchy bone marrow, incidentalhaemangiomata and chronic endplate changes (no convincing sinister features though). Oh and a sponylotic disc. At the time I was seeing a neurologist because I had suspected nerve damage. This too has now increased to dystonic tremors. My mental health has deteriorated and unless I have to I no longer go out and socialise.

Can someone possibly advise me what my GP should be doing if at all anything?

Marianne