I have been having problems with urinating blood for over 2 years now. It goes off and on, like once or twice a month. I have been taking so much antibiotics for infections that I'm tired of it. I just finish a treatment a treatment for 14 days last week and today I started urinating blood again. It comes after the urine and stain the paper pretty good. I had  x-rays, ultrasound, etc. and nothing has been found. I,m worry about it. I don't know what's happening...any idea?