Unprotected sex

I had unprotected sex on July 21st he said he didn’t came in me but just to be safe i took a plan b, I’d say 11hrs later, I got my period in a week but it only lasted three days, two weeks later I took a pregnancy test to be safe it came out negative I waited another week it came out negative again, i tent to overthink a lot so I took another and it came out negative, I have nothing to worry about right? Please lmk!! Thank you!