Are the white pills during the last week?

If so, you're fine. Those are just pills to keep up the routine of taking them.

I'm on yaz...white pills are just placebos to help you remember when to take the next pack so you're completely fine so long as you started your next pack extactly on time(which you said you did) so no worries!

as for the pull out "method"....its not really a method in my opinion, pregnancy can most definitely still occur(if no other form of b.c. is used)..but given the fact that you're on b.c. i wouldn't worry