i want to have sex!

I want to have sex on December 16th;my boos birthday, but based on the amount of bc pills i have left i’m going to be on my period 😩. he’s not against period sex, i just dont think i’m comfortable enough to do that just yet. Anyway, am i able to take my placebo a week early and then go back on my active pills to ensure i’m not on my period? or will that mess something up?