Could I be pregnant?

Had unprotected sex ~5 days before ovulation, on the last day of my period. I'm now currently 7-9dpo. My period is 5 days away. I've been feeling slightly nauseated all day, and my breasts are tender. I also had unprotected sex at 3dpo, but there's no chance I'm pregnant from that.

I highly doubt I'd be feeling pregnancy symptoms this early, but it's still got me a little worked up. I did take a pregnancy test and it was negative.

Could I be pregnant or am I overreacting?

Edit: Obviously I know I can get pregnant from unprotected sex. That's why we used condoms while I was fertile. The times we didn't were outside my fertile window. And plus the second time I wouldn't even be pregnant anyway since it was after ovulation. 😂