pregnant or just stress

okay so i’m sure i’m not pregnant but so me and my bf and i had unprotected sex the 19th of NOV and it was 3 days before my ovulation week but 8 from my ovulating day and he pulled out really early and i don’t think he pre cums at all and i’m positive he pulled out. but i got really sick and nauseous and took 3 tested 2 weeks and 3 days after sex and all came negative and idk if it was a virus but i’m sure it was cause i had a fever 99.8-100 but i feel fine now and have a lot of craving.. but i have back ache and sore boobs also no discharge whatsoever and my cervix is kind of low.I’m just stressed and paranoid because it WAS my first time.my period is supposed to come this week but do u think i’m okay and should stop stressing ? 🥺