Fourth day of ciprofor a severe bladder infection, but the pain is getting worse in my bladder and my back. I do not have a fever. Kidney infection?

Wrong abx. Or not an infection make sure a culture is done and get a different abx. Antibiotic. If culture negative its something else like interstitial cystitis.
Go see your doctor. Make sure you have a game plan in place for follow up care. If you're not getting better as expected, always go back to see doc. In the case of bladder infections, get your urine sent for culture & sensitivity so that you can be prescribed appropriate antibiotic for your infection rather than best guess, at least if you're not improving. Kidney infection is usually associated w/fever & back pain.