I Am Suffering From Unbearable Nerve Pain, Kindly Help

Im a 20 yr. old female thats 5 4 & 135 pounds. I have asthma , when i was younger i had tubes put in a few times, tonsules taken out, adnoids taken out, & pneumonia once. About a month ago i was diagnosed with eosinophilia & celiac disease when the doctor were trying to find out why i had pain. I had a lifting injury at work & i ended up hurting the lower left side of my back. Within a week the burning pain spread into my left leg. I have been seeing many doctors & been to many hospitals within the past year. The pain is now everywhere, burning, constant, & unbearable. I have tried everything & im on 14 different meds & the strongest 1 im on is dilaudid & the lowest my pain gets is a 7/10. Mayo doctors got me accepted into the 3 week pain program, but my insurance & a charity wouldnt cover it, so all the doctors have me doing is try to move around. What is this unbearable nerve pain & how can i fix it?