I’m confused y’all. Had sex Saturday, unprotected, he pulled out after I immediately said stop. Monday comes (today) I get my period. I’m not on birth control currently. But just to be safe, should I take the Plan B pill? I’m worried. But questionable because I got my period so soon. Anyone know any information about how long it takes after sex to get the “not pregnant period”

also, been on the depo shot, it ended in October, haven’t had a period since January 2018, this period came out of nowhere. Don’t know if that’s normal or what but 🤷🏼‍♀️