Hi all, I went to gp yesterday as I’d been having cystitis symptoms eg blood in Urine, pain when urinating. Anyway I was prescribed 3 days with of trimethoprim. So far I have taken 3 out of the 6 tables, so half way through course. Today, I have quite significant and constant pain on my upper back, under my ribs. No fever, just a throbbing pain in that area. I’m concerned I have a kidney infection but surely I would have a temperature?? Any advice please?