If you like Harold Budd, then you might like Jon Hassell, maybe? I’m thinking of albums like Aka Darbari Java or Dream Theory in Malaya, there are many more with a similar sound.
See a doctor, it could be any number of conditions.
I’ll mention multiple myeloma only because I have myeloma, and although I had long-bone pain and lytic lesions, I was lucky that I didn’t have back pain.
Koyaanisqatsi