Here are two articles about urinary tract infections you should read very 
carefully:
http://viewer.zmags.com/publication/24975063#/24975063/86
http://www.tahomaclinicblog.com/d-mannose-for-bladder-and-kidney-infections/

The first article gives a good over all description of the problem and the 
solution, but strangely does not mention D-Mannose, which is already available 
in most health food and vitamin shops.  D-Mannose is known to do exactly what 
the article describes as the best way to combat the problem.  Cranberry is good 
too, but, if I were you, I would start supplementing with D-Mannose immediately 
as per Dr. Jonathan Wright’s article above.  It can’t hurt anything and might 
very well work for you.  A good cranberry supplement too.  If these don’t help, 
then you can consider other, more difficult and dangerous options I would try 
these first.  

Del