yes, I believe it is a yeast infection. Because, taking in of antibiotics means killing bacteria --even the good ones. Ones the good bacteria in the vagina is killed this can lead to yeast fungi overgrowth...
here are some suggestions for you:
Natural Remedies
• Dip your tampon into yogurt, insert it in your vagina, and let it stay there for a few hours. Do this twice a day, and continue this remedy for an extra day once the itchiness and burning have gone away. Make sure that you use plain and unsweetened yogurt.
• Garlic has strong antifungal properties. You may chew and swallow at least one raw garlic clove every day. For non-vaginal yeast infections, you may apply garlic paste on the affected area.
• Mix 1 tablespoon of apple cider vinegar with 2 cups of water. Put one clove of crushed garlic in it. Let the mixture stand for some time before using it as vaginal douche.
• Pour a few drops of tea tree oil on a tampon and insert it on the vagina.
• Extracts of aloe vera plant can relieve itching and burning sensations in oral, vaginal, and penile yeast infections.
Additional Home Remedies
• Make a paste out of water and elm powder. Apply the mixture to the affected area. This will relieve itching, but will not kill the fungus that's responsible for infection.
• Mix a teaspoon of hydrogen peroxide with 1 cup of water. Douche the solution once a day, and continue until a day after the itchiness and burning sensations subside.
if you really want an over the counter medication I believe this site can help you just go to candida-solutions.com and they have a wide array of solutions for your yeast infection from nystatin, three lac, diflucan etc.. plus they have extensive readings on how each drug can cure your infection and maybe possible effects so you can choose which one is suitable for you.
PAIGE