Can My Girlfriend Still Get Pregnant After Taking Postinor 1 And Postpill Twice In One Week Following Unprotected Sex?

Hi please I had unprotected sex with my girlfriend last week Thursday and she use postinor 1. On Monday unconsciously I had unprotected sex again with her and she use postinor 1 and Postpill. Yesterday she discover yellow urine from are urine and that yellow urine is ones. Please with the use of those drugs is it possible that she still get pregnant?