I had a bleed that could be seen in urine this lasted 2 days advised drink plenty of water also had a slight pain to left side that lasted about the same amount of time,told to return in a week with a sample which I did to be told by a different dr that there was a trace in urine I am on 7mg of warfarin aday at the moment it has been as high as12 mg over the last 7years and I suffer from Hughes syndrome and Lupus have been referred for a scan and procedure , Dr stated that they are looking at cancer, I have never smoked not that this is the only reason you can get it any help would be gratefully received