I have been going thru so much, my doctor nor I know what is going on!?

A little history, for about the past 6 weeks I have had itching (outside), burning when I urinate, but no added frequency, discharge (clear to a light yellow color - no odor). I went to the doctor to be tested for STD, (not it), yeast infection (not it - plus had two doses of Dyflucan and 2 weeks of Monistat 7), urinary infection (nope, plus I have been taking AZO daily)! I have stopped shaving, using any kind of soap, and even bought new underwear in case I was allergic to my laundry soap. It's not getting any better. I am peri-menopause, not sure if that is it. I'm just tired of changing underwear twice a day and just not feeling comfortable. Could I be allergic to something and not realize what it is? Am I just going to have to live with this? I'm also not ually active, so count that out. I'm 50 yrs old and have never had this before, any help would be greatly appreciated. If you have any other questions, feel free to ask! Thanks so much!