Should I take a plan b?

Hi so a few hours my SO finished inside of me .. a little background is that I’ve been on birth control for 2 almost 3 years in January. 1st year I was on pirmella 1/35 somewhere in the 2nd year I was on 1/28 for like 6 months and switched back to pirmella 1/35. So I’ve been on birth control non stop. My question is … should I worry about taking a plan B? Thank you!