Terrible Recurring Vaginal Infection, Kindly Help Me

Hi, im only 18 years old and for the past 5 years or so iv been suffering from chronic yeast infections. I get them about once a month. and whenever i dont have a yeast infection ill get this reallllllly bad fishy odor with a white discharge which i soon found out is Bacteria Vagnitosis. soo i have either one or the other at least once a month. Iv gotten many prescriptions for them but they just keep coming back! It happens between each period of mine, and often comes faster if im having sex or being sexually active. I clean regularily and i always change my underware. my higeines fine. Iv also been checked from all stds, which im clear of, and diabetes. Another thing is that when im sexually active its REALLY hard for me to get wet or orgasm. And it often feels really uncomfturable during sex on the inside AND out. i neeeed helppp!!!