I started my period on the 9 my boyfriend and I had unprotected sex for about a minute normally and he finished in me during anal. I ran to the bathroom and expelled as much as I could. My period stopped the same day. Today my there's light bleeding. And it feels like a period. I still have cramps and all the symptoms of a period. I have a usual 28 day cycle and my periods usually last 5 days. What are the chances I'm pregnant? Is it even possible? Thanks in advance.