take plan b or not

can someone please tell my friend she doesn’t need to take the morning after pill every time she has sex, her and a guy had sex today and she said he wore a condom the entire time and than came in her mouth and she insists she has to take the morning after pill just be sure! She’s worried because the app says she has a 7.8% chance of pregnancy, yes he did finger her but this was all before he came.

- she said she cannot get it until later tonight or tomorrow is it worth it,