I just posted a similar situation that I had this week on the general health forum. I have had some problems in the past because of my bladder being too small and since I was a kid I don't empty it completely. I usually take cranactin which is a capsule that has the same thing as cranberry juice but without the carbs. Hopefully someone can explain what I can do to keep eating low carb and not have this problem, or maybe I should up my carbs and eat a little less protein. I am confused, because I don't always have e-coli but what ever bacteria is there just grows because I don't empty my bladder completely. I am sure drinking a lot of water helps but it has been worse since low carbing.