Anti-biotics as you know kill off the good bacteria in your gut and allow the yeast to thrive. Anti-biotics are a necessary evil.
I've had to take anti-biotics from time to time because of eczema rashes. I've had vulvae swelling which was not obviously related to yeast, as I didn't have the typical vaginal yeast issues. Vaginal swabs negative for yeast. No discharge. It had doctors baffled and yet I had redness in the vulvae tissue, swelling, itching and burning. I did not have your multitude of other symptoms. Although I had vaginal yeast issues when younger I started this vulvae issue around 65 after my hysterectomy. I am now 70. I am not a medical professional.
I did take anti-yeast prescriptions from time to time which helped to a point but symptoms always returned. A last resort was a vulvae biopsy for yeast which my gyno said would be painful, but decided to put off and to try a yeast elimination diet, recommended by a Women's Doctor, who is not mainstream. Understand, I am a mainstream sort of person and thought this doctor was strange, yet I was miserable and searching for alternatives. She said we don't need prescriptions. According to her and Dr. Oz (who I didn't know was even a real doctor) they believed yeast can be harbored inside vulvae tissue and has to be starved to death to kill it out. PX meds, while helpful and can be taken with the diet, won't do the trick cause they don't kill it all. I did a 2 month detox, based on the William Crook, MD book, The Yeast Connection Handbook. After 6 weeks a major improvement and decided to stay with detox for 3 months (some say that's best for a total kill) to make sure the residual yeast harbored in my intestines had finally starved to death. Lacking any form of sugar and carbs for a period of time it dies out. After 3 months and symptoms abated I now follow the Crook anti-yeast plan for life. Never processed sugar, limited natural sugar as in a small piece of fruit every other day and zero gluten for life. Now 7 months later vulvae still appears normal, color no longer bright red, no longer swollen. Yes eating like this is difficult to begin with, took 3 weeks for my mouth to stop watering just seeing a cookie or piece of candy. I still cook normally for my family and seriously it is not a challenge choosing the right food. Your sugar craving will stop once the yeast which is sending messages to your brain to be fed dies out. Just like a junkie goes though detox, you will go though sugar withdrawal. Also understand I have never been overweight or a sugar junkie. Still this diet was a challenge and one has to be hurting enough to attempt a sugar detox. Seem like you are. It won't hurt your body to try it and it's not expensive.
I made up a little jingle I would repeat in my mind when my mouth was watering looking at something sweet,
"When will you learn, It's going to make you BURN"