When Do Normal Pills Come After Taking Plan B Pill?

Hi how are you? I came on my menestrual cycle on Aug 2nd & i went off on Aug 5th. I had unprotected sex on Aug 6th around 11p.m. I took a Plan B pill on Aug 7th around 4p.m. I was on very lightly a few days like a week or so after i took the pill. I expected that from taking the pill. Should i come on my normal cycle on Sept 2nd?