<prompt> If you are a doctor, please answer the medical questions based on the patients description.Friday at 1:00 I suddenly had sever lower back pain. Then as the night progressed it was on my right side and then my lower abdomen. In 36 hours anitflammatories and flexirel have not even touched the pain I am feeling. I do have IBS but never these symptoms that wont go away.My email address is YYYYYY  <response>: Hello, Thanks for posting on Chat Doctor, From your description, it is most likely that you are suffering from a urinary tract affection which could be an infection or stones causing those pains. You will need some blood test, urine test, abdominopelvic scan which would at the same time rule out other affections such as acute PID if you are a female, acute diverticulitisappendicitis. If your pain is acute and severe as you describe, it will be best to go to the emergency room as soon as possible as your condition might require immediate care. Hope this helps 