Thank you for your question. I can feel the immense level of frustration you are experiencing through your experience. Just reading about your case makes me angry and sad at how slow mainstream medicine is when it comes to understanding health and wellbeing. The reliance on antibiotics when in doubt is so damaging and is the main cause of your problem, not the initial disease.
I think that the your case is one of a little problem turning into a big one where it could easily have been arrested in the early stages before it turned out so messy. From the your history I don't doubt that you began with a bacterial urinary tract infection (UTI). The doctor's route of antibiotics was appropriate according to the protocols most doctors follow. But when you experienced no resolution of symptoms the doctor should have done a urine culture before putting you onto further courses of antibiotics.
When they did do a culture they found a fungal infection (Fluconazole is an antifungal and not an antibiotic) which is not surprising as a side effect of repeated unecessary antibiotic use is fungal over growth. When they sent you to hospital and found no signs of pyelonephritis there was no indication for intravenous antibiotics, which probably did further harm instead of healping you recover. Now you are left with a problem that is months old and with worries of more serious problems with your kidneys. The changes you are experiencing in your menstrual cycle are probably due to the high amounts of stress you are under as a result of this condition, as well as the compounding effects of multiple antibiotic courses on your immune system.
The main ingredient missing from this mix is a strong probiotic. If you did have a bacterial infection, and it did respond to one or more of your many antibiotic courses, then the antibiotics cleared out both the bad bacteria and the good bacteria. With the good bacteria gone the fungus had plenty of opportunity to overgrow and, surprise surprise, it gives you exactly the same symptoms as a bacterial overgrowth if ocuring in the bladder. That's why urine cultures should be done after the first course of antibiotics have failed.
The repeated courses of antibiotics have only to further compromise your immune system, both locally in the bladder/vulva area, causing a continuation of symptoms, as well as systemicaly. Do you have a recent history of several little but not serious respiratory or gastrointestinal tract infections?
I would not bother with a gynae or a urologist now. All they can suggest is further courses of antibiotics or steroids, which will only worsen your condition, not help it.
I would start with a strong probiotic, preferably from the fridge section of you local health shop - try UltraFlora Plus by Metagenics and use one capsule before breakfast and one before dinner. Secondly I would stop all antibiotics. Thirdly I would begin using a D-Mannose supplement (Solgar make an excellant one). Thirdly I would look at ways to supercharge your immune system - cut out all sugar, dairy and wheat, use a Vitamin C supplement (Ester C from The Real Thing is a good example), exercise three to four times weekly.
These are the more general places to begin with. If you have any other conditions or are using other medication then it becomes a little more complex as some conditions can affect the immune system adversly requirng more specific therapy. In this case I would begin with the steps above, try them for at least a month, and if there is no resolution then contact either me via www.healthnation.co.za or your nearest functional medicine practitioner for more help.
Many thanks and warm regards