Plan B / Ella

I had unprotected sex on the 11th and took an Ella emergency contraceptive within the time range I should have. My next period is to start on the 2nd. But I had unprotected sex last night, I’m in the luteal phase of my cycle which also means my odds of getting pregnant are very low. But should I still take a plan b this time around to be sure ? I also took a clear blue pregnancy test that came back negative 2 days ago which was four days before the said expected period on the 2nd.