Vaginal vitamins/pills/supplements

I constantly get yeast infections, UTI’s, and other vaginal irritations. I have sex atleast once a week and it seems like every time I do, my vagina gets irritated! I only have sex with my partner of 2 years. We’ve both been tested, and we’re always clean when we have sex. I always go to the bathroom afterwards. But I still end up getting an infection or just having irritation. Maybe my vagina is just super sensitive I would guess? Are there any vitamins, pills, or supplements I can take? I’d love to hear if you’ve personally taken some that work well for you!