Possible pregnancy? HELP💖

So it’s about 4 days after sex, and I’m due my period in 5 days. I never feel nauseous, but the past two days I’ve been feeling very nauseous, I’ve also been having headaches, and I think I have a UTI coming on. I don’t know if these are symptoms, but I also think I am spotting a little bit. What do you guys think? My breasts aren’t in pain, so I don’t know if I’m just having menstrual stuff or if it could be something else!