Sex twice in a row

Cindy

If I have unprotected sex twice in a row using the pull out method. And my bf does NOT urinate before resuming sex, do you think I'm pregnant? We didn't have sex right after his first ejaculation, we chilled for about 20 minutes before we went at it again. I'm scared of the precum having left over sperm from previous ejaculation. What is the likelihood that I'm pregnant? This happened last week (the 5th), I'm suppose to start my period this week around the 15th-17th