I need advice.

Good morning everyone! So l took a plan b on Jan 6 which apparently was my highest fertility day but he didn't cum it was just pre cum. I'm supposed to get my period next Sunday Jan 21 and today I took another plan b because he actually came inside. Should I be worried for pregnancy? Ik I'm not supposed to be taking plan B like candy but I just got off bc because of my mood seeing's and I think I will be going back on it. Should I be worried about pregnancy or I should be fine?