Plan b and second period

Hi everyone, on October 27 my boyfriend and I had sex, he didn’t cum in me but we noticed the condom broke... to be safe I took plan b within the hour (even though I already ovulated and was getting my period in the next few days). We didn’t have sex again that day. I took the plan B and got my period normally on November 3 for about 5 days as expected. We’ve waited to have sex again until I start my oral birth control pills, but I’m waiting on my second period to come since it’s Sunday start pills... still hasn’t for about 11 days, and to ease our minds I took 2 pregnancy tests, both negative. Is this normal? I’m stressed over it so I know it’s not helping my period coming. Appreciate all help :)