Get thee to a Dr. I found when I had Yeast infections often I actually had BV. Bacterial Vaginosis can be caused simply by wiping the wrong direction or from having anal and then vaginal sex. The bacteria that belongs in your colon and helps you there is quite a problem in your vagina. A Dr is the only one that can diagnose it and give you a perscription to treat it. Once my Dr found that I had it, and I was having trouble getting rid of it, she gave me a perscription that I could refill as needed when I developed symptoms again.
Sometimes you can have BV and not have any evidence of it. Frequently it is combined with Yeast infections and makes you more suceptible to yeast infections. Also treating yeast infections makes you more suceptible to BV.Some charateristic symptoms are: Fishy smell, cottage cheese or curdled consistency of the discharge, white - milky discharge, burning, itching, and sometimes pain during and after sex.
Web MD BV
If it's only Yeast infection. I try to stay away from the sweets. They encourage the growth of yeast. They won't initially cause the infection but can prolong the infection. I take an herbal suppliment of acidophilous tablets. I usually just get mine from my Walmart (top shelf - by the vitamins) but the better quality ones require refridgeration. They tend to be more effective. I also eat yogurt with live acidophilous cultures. Acidophilous is a live bacteria that eats much of the same things as yeast does. So it competes with the yeast in your body and helps any antifungal medications get rid of it.
Also - don't take a lot of bubble baths. For some reason the perfumes tend to alter the pH and cause many women problems. If you want a bath use Epsom salts. Those are one thing the Dr recommended to me to relieve the itching and burning from BV and/or yeast infections.
Wear cotton panties and not thongs as much as possible. Keep things dry. Don't use perfumes, body sprays, or baby powder down there. If you want to use a powder of some sort you can use baking soda. It doesn't have the scents and it will help absorb moisture. I also find that douching usually messes me up in the long run but if you do douch use one that is simple water and vinigar and not scented.
WebMD Yeast
In the end, I usually opt for the 3 -7 day treatments since the 1 day treatments seem to not be as effective. The last time I used a yeast infection treatment though I used the 1 day ovule from Monostat. I found IT to be VERY effective albeit Quite expensive. Good Luck battling the yeasties.