Do I Need To Take Plan B Again After Unprotected Sex Without Ejaculation, And What Are The Pregnancy Risks If I Don’t?

I had a question. So my boyfriend and I had unprotected sex on Friday and I took the plan B pill. We also had unprotected sex today but he didn’t ejaculate. Does the plan B pill still work or would I have to take it again? And if I don’t take it what are the chances of getting pregnant?