You need to take more and different drugs, never fear addiction.
Pain killers are no use unless they're killing pain.
I had a similar situation last year and found a combination of Ibuprofen and paracetamol taken regularly helped a great deal when coupled with Amitriptyline. I went down the 2mg Valium road but eventually convinced old risk-averse that it needed more and got 5s.
Doctors do sometimes need reminding of who it is that's in trouble.
I did find that the stuff with codeine in worked to a degree but the constipation made it unworkable.
Physio and chiropractor only seemed to aggravate the situation, later found by MRI to be herniated discs, and when left to nature taking its course things began to improve.
A bit rambling, I'm sorry, but in a nutshell, take the drugs, get a scan and definitive diagnosis but most of all, take the drugs.