Suggest Remedy For Recurring Yeast And Bacterial Vaginal Infection

i have had recurring bacterial or yeast infections almost monthly. I seem to start with this almost immediately after my period. I have tried acidophilus and numerous vaginal prescription creams, etc. but nothing really seems to be working. I have had numerous tests done (including an MRI for a small fibroid) and all has come out well, thank God. Do you have any suggestions? I am 46 years old and am already experiencing some signs of pre-menopause with some night sweats, etc.