What to do

My boyfriend and I always use a condom when we have sex, but last night we didn't because he forgot to bring one. I've been on the birth control pill consistently since May and I know it says to not take it if you could be pregnant. I won't know if I'm pregnant or not for another three weeks because that's when I'm supposed to get my period. My question is: should I continue taking the birth control or should I stop until I know I'm not pregnant?