Hematuria

[andoy]

Hi!!

I'm just new here and i'm only 19y/o. I'm just wondering what must be the cause of having color cola in your urine(don't know if it's really hermaturia.) My history is in August 19,2007 i just undergo to a kidney transplant so it's about 1yr and half by now. This was the first time i ever seen my urine in my entire life with that color. And i'm scared if my transfered kidney got been rejected or what..? First when i see my urine like that i used to drink more water and after 1 day it was gone but then the other day i was shocked b'coz it's back again. I used to drink more water again and it was vanish again. Is drinking more water can make this ill gone??? All ijust feeling by now is only abdominal pain and i got cold and flu right now.!!