Bacterial Vaginosis- Wont go away!

Okay so heres the story. Almost four months ago i slept with my now boyfriend for the first time. I am on the pill, and we did not use a condom. A few days later, i woke up with a pretty bad burning sensation down there. I went to a walk in clinic and they perscribed me antibiotics for a UTI , adn I felt pretty much back to normal the next day. The next couple weeks i was fine, but then i got the burning sensation back but not as intense. I thought that maybe i just hadnt gotten rid of the UTI from before fully so i went back to the clinic and they gave me more antibiotics, but for a bladder infection. Still, nothing. Went back AGAIN and they gave me more. Nothing. During this time of going back 3 times, i got tested for stis (everything.. including herpes) and i was clean. I started noticing a bad smell and some white discharge. I went and looked up my symptoms on my own, and thought it may be bacterial vaginosis went back to the doctor nad thats what it was. He prescribed both me nad my boyfriend a weeks worth of flagyl. Made us both feel sick. We didnt have any sex , and for the first time in like 2 months i felt good. I was so happy but when we both thought it would be okay to have sex again ( we did wait ) we used it with a lube i never used efore nad i remember it burned for the first bit.. and then it came back. I went back aboout a month later and since the flagyl made me feel weird they gave me clindamycin cream that you insert vaginally. This didnt work as well as i thought it would.. still had symptoms. After using the cream i noticed a rash on the inner paart of my lips. I have been tested for sti's so its not herpes. I then went to a drug store and got Rephresh's Pro-B supplement which has all the probiotics that you need in order to maintain good bacteria down there. It IS working, not perfectly but it definately is giving me some relief for now. Only thing is, its super expensive nad i am a student and this is really hard for me to afford for the rest of my life.. and sometimes i still feel like its there. Also, my boyfriend has no symptoms. Heres what ive tried for the bv:
-garlic pills vaginally and orally
-folic acid
-apple cider vinegar orally and also in a douche
-acidipholis probiotic (sorry for spelling, been taking this almost since the beginning of my episodes)
-cranberry pills
-eating TONS of natural probiotic yogurt
-using condoms lately when having sex, and showering/peeing afterwards
-stopped taking baths and stopped drinking pop

:( nothing is really helping 100 %... ive read so much stuff online and im started to get pretty scared about this.