I might be pregnant


I had unprotected sex with my boyfriend on the 1st and he cummed inside of me. My boobs are tender and I’m just don’t feel like myself but I’ve taken a test and it says negative. I’m not sure what to do. On this app it says my ovulation date is a week later after sex however on another app it says my ovulation date was 3 days after having sex. Could I be pregnant or maybe I’m just feeling under the weather?