"I've been sent round in circles for the past..."

I have had blood tests, xrays, scans then physio Therapy, blood test, Xrays, scans then physio therapy, blodtest, Xrays, scans then physio Therapy for the past four years, they say they don't know what is wrong with me, but one doctor slipped up and said I had traces of rhumatoid arthritis, then she said they were high, now they say they don't know, the hospital have prescribed steroids and other medication for something they are not sure about, I have now got in touch with iron Mitchell as a last resort and hope they will use their own doctor to do tests and come up with an answer