Hello, You are suffering from vaginal bleeding after intercourse. You had unprotected intercourse with your boyfriend. It can be due to friction during intercourse, always use vaginal lubricants. Make sure that you are wet before penetrative sex. Other factors that can lead to vaginal bleeding post intercourse are vaginal dryness, PID, Polyps, genital sores, injury to the uterine lining (endometrium) during intercourse, especially in women taking oral contraceptives, vaginitis or menstruation. Sometimes, it can be indicative of implantation bleeding if unprotected intercourse took place during ovulatory phase. You are suggested to get clinically examined by a Gynae, get per vaginal check up done. Get STD tests done to stay on the safer side, if positive you will be treated with antibiotics/antivirals. Take care of your hygiene. In case of any injury due to friction rub, you can apply ointment Soframycin for relief. Take acetaminophen, one stat when needed to get relieve from pain. In case you miss periods you should get pregnancy test done. Also get clinically examined by a gynecologist. You will be treated accordingly. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician