Suggest Treatment For Rheumatic Fever And Lower Back Pain

I have discitis at L1L2 . I have been treated with with 13 week course of clindamycin fluclox and rivampicin, this now complete. At first I was treated with if fluclox via Hickman line then sent home with oral as above. It was suggested strongly I have physio, this has not been acted on neither has the heart scan that was suggested as I had rheumatic fever as a child I am now 67 yrs old, I cannot find any info anywhere and appear to be left my own devices with low back pain which goes across my left pelvic girdle and into my left buttock analgesia does not appear to make much difference, I have lost over 2 st and now weigh 9st I have no other medical probs and wish to get back my normal active life, would physio help? I am in uk and using NH S which I also work for and have never come across this condition in my 38yrs as a nurse therefore have nothing to guide me.