Plan b before my period

Hey, Im having a little panic but not something of another world I would like to talk about it here. I usually use condoms but im not using any birth control, unfortunately me and my partner decided to do the pull out method, but in the act i told him to come inside which i never thought he would because he knows im not planned. Anyway we went to the pharmacy got a plan b and i took it, but i already ovulated a week ago and my period is soon coming just another week but im a little bit worry what if it doesn’t work bc i is too far away from my next ovulation or what if I didn’t need it bc my cervical fluids are not watery im in my final phase i believe. This is my first time taking the pill after actually getting semen inside my parts and i don’t know what to expect im a little bit scare. Anyone with the same experience or similar ?