Yaz BrithControl

I have just recently started taking birth control, YAZ to be exact. And I was wondering if anyone could tell me... Well, I should start off by saying that i may possibly be pregnant. Anyone who takes Yaz, or birth control in general if they are all the same; could you tell me when my period is supposed to start? Once I start taking the white pills, or after i take the 4 white pills? (the white pills are the last pills for the month.) If I am pregnant, I dont know it. but i need to know so that i can stop taking the birth control, because can that affect the baby? And what affects will the birth control pills have on the baby?

[GRose]

Your period should come while you are taking the placebo(white) pills. Mine usually comes on the second placebo pill but
Your doctor should have given you a pregnancy test before he/she prescribed you birth control.

[GRose]

ooops,  didn't mean to post that. I was going to finish the second sentence by saying that it is different  for everyone but it should be during those last seven pills.