Is Pregnancy Possible Despite Taking Plan-B?

Hey! So I m on the Gildess 1/20 Birth Control pill, I missed a pill, and had unprotected sex, so I took Plan-B One-Step about 28 hours later. I read that you re supposed to take the pill for 7 days after emergency contraception to be safe, so I took it the following day, from Monday-Sunday (7 Pills). Tonight, I ended up having unprotected sex with him again, but this time it was only for a bit before he put a condom on, and then finished with the condom on, therefore no sperm came in except for what could ve been in the pre-cum. Should I be worried about pregnancy? My last pill is tomorrow before my 7-day break begins.