Possible pregnancy????

When I wipe the toilet paper is light brown to a pink color. I just ended my period Thursday and was fertile Saturday and Sunday and had unprotected sex both days. Saturday I was 22% chance and Sunday was a 8% chance. He did cum inside of me both times. Another question I had was could you have a period and be pregnant. I thought I was pregnant and had my period for 6 days. So could you have one period right before? I never experienced any of this and I'm trying to conceive.