Who told you that you had blood in your urine?
Also did the person say if the blood came from the bladder or from another region?
I know not knowing anything is worse than just about anything the doctor can tell you. I'm in that same boat myself right now. There's a mass sitting between my ovary and uterus that the doctor couldn't get a clear picture of at the ultrasound so I have a biopsy scheduled on mon and I was told it takes two weeks to get the results of that back. The not knowing anything and waiting is killer!!! But I have decided that its not going to change anything if I worry myself sick any more than if I relax and just go about life as usual.
Until your doctor can tell you for certain where the blood is coming from, there's not alot that can be done right now.
If you start feeling a really sharp pain in your shoulder/chest area - get yourself to a hospital as that is a symptom of internal bleeding.