I'm currently at 8dpo I had unprotected sex a day before I ovulate and he "did" in me. I'm having off and on

cramps, headaches, nausea, dizziness to the point of nearly blacking out, my sense of smell is a bit more heightened, I'm having these vivid dreams omg, and I don't have an appitite, also alot of gas and serious acne . You guys think it could be a state of mind thing or can I be pregnant? I've taken 2 test I got BFN. I know it's a bit early but omg this TWW is so SLOW

Thank you if you guys have responded 😊