Bleeding after sex??πŸ˜₯πŸ˜₯😷😷

Just had sex went pee noticed I'm bleeding it's not heavy had mild cramps during sex got low back pain trying to figure out what it can mean?? Does it mean I could be pregnant? Or ovulating? I'm on cycle day 20 according to glow.. AF is due on the 6th or 7th here's my glow calendar please someone tell me😞