Is it a yeast infection? What should I do?

If there is no strong odor, it could indeed be a yeast infection. In that case, you can try treating it with creams or a single pill taken orally. You can find over-the-counter treatments like Canesten creams, which are effective. If you prefer a single pill treatment, you can ask for it at the pharmacy counter. These treatments usually take effect within 1 to 3 days. If symptoms persist after 4 days or after completing the treatment, it's best to consult a doctor in case it's something else.