Over the weekend i went to the emergency room....prior to that i have been on 500 milligrams of cipro twice a day. the dr at the emergency room tested me for infection, blood in my unrine, my liver function, and all is normal...HOWEVER it still feels like i have to urinate after i have already done so. It hurts so bad i cannot stand the feeling of having to go again...it is painful it comes and goes, and when it hits it hurt...what can it be?