Conversation: The conversation between human and AI assistant.
[|Human|] I took plan b twice within a weeks time and had just started my birthcontrol about two weeks before that its been over a month and i still havent gotten my monthly period. I took a prego test and it says negative. How far can it throw off a persons cycle?
[|AI|]  Hallow Dear, What I gather from your brief history is that after taking Plan B pills, you have started birth control pills before you got your menses following Plan B pills. In fact this is not the way to start birth control pills. They should have been started on the second day of the menses following Plan B pills. Anyway, you have started regular contraceptive pills; so you should get the menses within a weeks time after finishing this month's pack; provided it is 21 days pack. If it is 28 days pack, you will get the menses during the last 7 different colored pills which do not contain hormones. However, considering the irregularity in starting the pills, if you do not get the periods within a weeks time after this pack, please report to your Gynecologist.