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Dr. Andrew Rynne
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Dr. Andrew Rynne

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Exp 50 years

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How Late Will The Next Period Be While Taking Birth Control?

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?
Sat, 10 Sep 2016
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OBGYN,  's  Response
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 coloured 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 Gynaecologist.

Dr. Nishikant Shrotri
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How Late Will The Next Period Be While Taking Birth Control?

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 coloured 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 Gynaecologist. Dr. Nishikant Shrotri