Hello! I have been through your question. Related your concern I think you have urinary tract infection (most probably pyelonephritis).Usually, a frequent urination, chills and fever are the symptoms of pyelonephritis.What I suggest for you is to do a physical examination by an infectious diseases specialist, urine test, urine culture,full blood count, azotemia/ creatinemia, abdominal echo (to exclude renal problems) in order to define better the diagnosis and to start the prompt adequate antibiotic (usually I prescribe ciprofloxacin or bactrim). I hope my answer helps you. I wish you a quick recovery.