Am I good?

I just had sex with this dude and he wore a condom. However when he was stroking we were going at it so he had finished however I was close to orgasming that he just kept going so I could finish which I did!!! But now we’re both paranoid about the chances of me becoming pregnant because he kept stroking after and should I take a plan B. I just finished my period on Wednesday soo idk what that means are the chances higher??

I know I should be on the pill which I was for like 2 years but I broke up with my boyfriend so I stopped taking it thinking I was done having sex in January (Boy was I wrong thinking I could last LOL). And I know plan B messes up your cycle cuz mine is barely stabilizing after birth control.

Also PSA when I showered I cleaned down there was discharge with blood from what I’m assuming was remaining from my period.

I just want to know if I should take the plan b or not?