external yeast infection from hell

Hello all.

So, I am age 24 and I am finally posting this to see if I can get some answers with some of the things I've been recently dealing with. I just took an antibiotic about 3 weeks ago because I was informed that my partner had Chlamydia. Popped the two pills and a week passed by and all seemed well. It seems like hell stepped into my life the second or third week after taking this antibiotic and I feel itchy in every corner and crevice of my vagina. Even my armpits are itchy!! I immediately ran to Planned Parenthood to find out that I had a yeast infection. I figured this was the case considering the doctor told me getting a yeast infection might be possible on the antibiotic and to just "eat some yogurt". Just eating some yogurt didn't do anything and now I'm going on 1 month dealing with this insane itching (which is almost entirely external at this point). The doctor gave me Diflucan which I am now seeing that a lot of women have taken and haven't seen many results. I completely swiped sugar out of my diet (going on 5 days strong now) which was not an easy thing to do. I eat tons of kale and have even started eating 1-2 cloves of Garlic a day (as a I read this will kill the bad bacteria if eaten on a consistent basis). After 5 days of this new diet I still had the external itching like no tomorrow which is also occurring in my anus as well, and my pits. I am assuming it spread. So, I go to the store to purchase any kind of cream I can. Vagisil max strength anti-itch. It provided results but the itching would come back after 5-6 hours and I would have to re-apply. I finally talked with my grandmother who used to be a nurse and she recommended I went straight to the store and bought distilled white vinegar, which I did. Day 1 of dabbing distilled white vinegar on my vagina (and anus) and even though it burned I am starting to feel as though the itching is disappearing and the redness on my inner lips is slightly going away. I am just wondering if this has worked for anyone else or if what I'm doing is even right? I don't want to be on an anti-sugar diet forever because it's miserable and it wasn't until this ridiculous antibiotic that I started having to switch my life around. I take 50 billion probiotics per day (1 pill), eat zero sugar, drink only water, and have now accepted white vinegar into my life and don't want to smell like a pickle forever. Someone help. I am moving into 100% tea tree oil in hopes that this will help, and maybe witch hazel...any input appreciated.