Hi, Femilon is an oral contraceptive pill and this will not cause the side effect that you are experiencing. Your symptoms could be due to an infection in the urinary tract or in the reproductive tract. We need to do a urine routine microscopy and a urine culture sensitivity to rule out an infection. Also, look for vagial discharge, fever or lower abdominal pain. Meanwhile, drink a lot of water and cranberry juice. femilon is generally a safe tablet but can sometimes cause bloating, nausea, weight gain and vascular problems. It should only be prescribed after a careful history and examination. please see a physician. this definitely needs an evaluation regards