18dpo pregnant or period

I’m 18 dpo and I’m 4 days late for my period... I’ve been having bad acne and beyond tired. Getting small headaches and pretty hungry and some nausea and light cramping. Normally before my period I get bad cramping and headaches, boobs hurt and I get really light headed to where I almost pass out. I haven’t had any of those symptoms.. I had unprotected sex with a friend on the 28th and I don’t know if he came in me because I was drunk. The morning I woke up and peed some white cm came out and two days later it was yellow. It stopped and I was fine not itching or burning. Then a few days after that I almost threw up from nausea. Since we had sex my cm has stayed wet and white and I’ve had a high sex drive. My question is had this happened to you and did you end up pregnant or just a late period? I will take a test in a week if it doesn’t come I just don’t have a way to get test right now. Please no bad comments :)