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Well a vaginal yeast infection is a common problem that may follow antibiotic treatment. If this is the source of the irritation than you may benefit to try a product such as MONISTAT ( different products > you may try the 3 day pack Ovule plus external combination pack)
Neosporin would not be helpful for yeast ...
Your description does not SOUND so typical and thus you may benefit from exam if you have any worsening or fail to improve soon with Monistat treatment
I hope that this information is helpful for you. let me know if you have further questions or concerns. Please remember to leave positive feedback if my answer has been helpful and to your satisfaction. Thank you and Best Regards,
Anthony Bray MD