I would take a test just to be sure (unless you are not sexually active of course

) ...
Did you double up on pills the days after missing? Was it recent that you missed? Your hormones could be higher than they should be if so that *that* could mean it's taking longer for them to fall and your bleeding to begin...
Did you bleed at all after missing pills? It could be you don't have much lining left to shed if you did... but I have always had SOME bleeding even when missing a few pills. Of course we're not all the same so who knows?
Anyway I'd test to be sure.