Early Menstruation After Missing Birth Control Pills

Taking premenstrual medication can cause an early onset of menstruation?

Because I forgot to bring my medication (Yaz 28-day) on 10/19 and 10/20, I didn't take it.
So on the nights of 10/21 and 10/22, I took two pills each night.
However, on the morning of 10/23, I noticed some blood that looked similar to menstrual blood.
Is that my period, or is it breakthrough bleeding due to missed doses? My expected period is on the 27th.
I still have 3 active pills left in this pack, plus 4 inactive pills.
Should I continue taking the remaining pills and then start the next pack? Thank you, doctor.

Yu Xiao Jie, 20~29 year old female. Ask Date: 2023/10/23

Dr. Zhang Kunmin reply Obstetrics and Gynecology

Hello, if you miss taking your birth control pill for more than 24 hours, you should stop taking the current pack of pills and refrain from taking them for seven days (including the days you missed).
After that, you can continue with the next cycle.
If you miss a pill and do not experience the expected withdrawal bleeding during the subsequent pill-free interval, you should consider the possibility of pregnancy.
Thank you! Wishing you safety and health, Dr.
Chang.

Reply Date: 2023/10/23

More Info

When it comes to understanding early menstruation after missing birth control pills, it's important to first recognize how hormonal contraceptives work and the potential effects of missing doses. In your case, you missed taking your birth control pills on October 19 and 20, and then took two pills each on the 21st and 22nd to catch up. However, you noticed some bleeding that resembles your menstrual cycle on the morning of October 23.

This bleeding could be attributed to a few factors. First, missing birth control pills can lead to a drop in hormone levels, which may trigger withdrawal bleeding. This is similar to what happens during the placebo week of a birth control regimen when hormone levels drop, leading to a menstrual-like bleed. Since your expected period was not due until October 27, the bleeding you are experiencing could be a side effect of the missed pills rather than your actual menstrual period.

In terms of your current medication regimen, it is generally advisable to continue taking the remaining pills in your current pack as scheduled. This means you should take the three remaining active pills and then proceed to the placebo pills, if applicable, or directly to the next pack if your birth control does not have a placebo week. Skipping pills or stopping the regimen can lead to further hormonal imbalances and increase the risk of unintended pregnancy.

If the bleeding continues or becomes heavy, or if you experience any unusual symptoms, it would be wise to consult with a healthcare provider. They can provide personalized advice and assess whether any further action is needed, such as a pregnancy test or a review of your contraceptive method.

In summary, the bleeding you are experiencing is likely due to the missed pills rather than an early period. Continue taking your pills as directed, and monitor your symptoms. If you have any concerns or if the situation changes, do not hesitate to reach out to a healthcare professional for guidance.

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