Bv or yeast

For the last 6 months, i’ve been having crazy discharge, itching and burning. Problem is i dont know if my bcp are causing this, or if i keep contracting it from my boyfriend. He doesn’t have any symptoms of a yeast infection which is driving me nuts. I have to buy creams every month, it clears up, but after like 15 days it just comes back, and im back to wearing pantyliners, because i have this pale yellow discharge. I take probiotics, i drink lots of water, i pee and wash myself after every sexual interaction. I don’t know what to do anymore. My doctor tested my urine sample, and it’s not trichomoniasis. Did it happen to someone else too, or am i left alone in this?