Period during Birth control

iVillage Member
Registered: 10-26-2004
Period during Birth control
Sun, 11-14-2004 - 10:46pm
I wrote a couple days before about me starting birth control on Sunday(today)without getting my period since it comes so irregularly. My period is over a week late and I took a pregnancy test and it was negative so I started my bith control today. I am just curious what it means, or what will happen if i get my period in like the next week or two. Will that mess up the birth control's schedule? Thank you