Help !!

Okay so the dates that I have circled are when I had unprotected sex I circled the 18-19 because it was the middle of the night , so about a week ago I started cramping and having sore boobs the cramps were consistent and I also had lower back pain today while in the shower pinkish reddish slimy discharge came out but nothing else can someone tell me what’s going on ? Also my period is due tomorrow