Thanks for your question on Healthcare Magic. I can understand your concern. Foul smelling menstrual discharge is commonly seen with vaginal and cervical infection. Hormonal contraceptive pills can cause infection by decreasing local vaginal defense. So better to consult gynecologist and get done clinical examination of vagina and microscopic examination of discharge. You will need antibiotic cream and oral drugs for recovery. Wash your genital area with warm water and betadine. Avoid perspiration and moisture in private parts. Keep proper hygiene of private parts. Drink plenty of fluids orally and keep yourself hydrated. Don t worry, you will be alright with all these. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.