Help/advice please.

Okay. I had sex Friday the 20. It was unprotected & I was on top. He said he was about to come so I jumped off. I don't know if he still could of came in me. But this morning I started having light cramps & I have a lot of vaginal discharge. And today is the first day of me being fertile. Am I pregnant? Or what's going on. I need help and advice please. Thank you.