plan b if I MIGHT be pregnant ?

I had my period over christmas. 2 days before new year’s <a href="">eve</a> i had unprotected sex with Guy A. He came in me.

The day after, I had unprotected sex with guy B. He didn’t cum.

A week later (today) I had sex again with guy B who did cum in me this time. We went to the chemist and bought plan b.

They advise not to take if there is a possible chance you may be pregnant already if i’ve had unprotected sex since my period. Should I take it or not?