I have had few whacked out periods and it finally regulated itself towards the end of last month when it started on track again. I ended my period a few days ago and now it's started again. I don't know what is going on my doctor said previously that my period was off track due to me missing a week's worth of pills and I didn't have sex within that week (which by the way was a few months back) so no I'm not pregnant. I just don't know if it could be my birth control or what????