Bacterial vaginosis

i feel like i have made so many posts about this but ab a month ago i was diagnosed with bacterial vaginosis . i took the antibiotics which were awful but it was almost like it didn’t go away ? i mean i never had symptoms before but the only thing i can think of as a symptom was the old blood i have a week before my period . i shouldn’t be having old blood because i had my period for 21 days before changing birth control . but i do NOT want to go back on antibiotics . i couldn’t eat and i lost 7lbs because they made me feel so bad . i got some probiotics today called “RenewLife Ultimate Flora Womens Care Probiotic” does anyone know if this brand is good and if it would actually help me ? it says it helps maintain healthy vaginal pH and yeast levels .

the old blood also has a bad smell but it’s the only time i smell bad right before my period .