I am so sorry to hear about your plight and am wishing you well. I think the advice given by TC-12 is great advice because getting those tests done will definately help you figure out where the problem originates. In the meantime, there is an EXCELLENT deoderant powder called Vagisil that is EXCELLENT at covering odors. Normally, it is for women (used on the external vaginal area) but anyone can use it. It has an odor blocking formula and I use it all the time. You might want to try putting some of this powder in your underwear and around your problem area and Im sure it will help combat the smell. You can get this at Walmart.
Try it and I sincerely hope it helps until you can get those tests. Good luck.