Hello, I Had Unprotected Sex 1 Week Ago And Took

Hello, I had unprotected sex 1 week ago and took post pill. A week after I had on protected sex and I was and I was about to take the post pill immediately after it. When I notice I was bleeding(period) which lasted for 5 days and it was not as heavy as my period. My question is can I be pregnant? Because I didnot take the post pill the second time even though I taught I was on.