Hello, thanks for using health care magic. An unprotected intercourse the day after your period will not lead to pregnancy unless the bleeding you had was not your menses. Periods come because the uterine inner lining gets slough off thus making it unfavorable to accommodate a preg- nancy. Thus its less likely you could be pregnant after that. On the other hand, it is more likely to have picked up an infec tion following the intercourse. This is so because blood is a rich culture medium and any germ that enters shortly after your periods is more likely to survive and cause an infection. However getting a pregnancy test and a vaginal swap test would be the ideal things to do. Hope this helps you. Dr Achuo