Urinary tract infection or jock itch undetermined diagnosis

Patient: Extreme itching and burning is still going on since March2011,and now I see blisters and raw skin due to all the scratching,and we are in December. My family doctor tried cream for jock itch which he thought it was. After 3 weeks of steriod treaments and everything I have been trying since that medication was finished I am still very emotionally upset about not getting proper diagnosis.What else can I ask my doctor to get proper diagnosis?