Yes, it is possible to develop a vaginal yeast infection after taking antibiotics. In this case, it is recommended to finish the antibiotic treatment and then treat the vaginitis separately. Over-the-counter treatments may help, but if the symptoms persist, it is advisable to consult with a pharmacist or a healthcare provider for more effective treatment options. Symptoms of a yeast infection may include increased vaginal discharge resembling cottage cheese, itching, pain during intercourse, irritation, and swelling. Other risk factors for yeast infections include wearing tight synthetic clothing, taking corticosteroids, having unprotected sex, or using certain forms of contraception. If your symptoms include a fishy odor, it may indicate a different type of infection that requires prescription antibiotics for treatment.