Week after ovulation...preg symptoms?!

My bf and I had unprotected sex last Thurs, according to my calendar, I ovulated Fri. My cycle is always very regular. Sat AM I started cramping slightly, lower back ache, and headache. All of which have continued along with off/on nausea, exhaustion, thick white discharge, bloated. Could I be preggo? Too soon to test, but I read a lot online about my symptoms and they sound promising! Def nothing I've ever felt before. Thanks