Did Missing Birth Control Pills Cause Early Menstruation?

Forgetting to take the oral contraceptive pill can lead to an early onset of menstruation?

I have been consistently taking oral contraceptives for about six months.
Previously, I was taking Medroxyprogesterone, and for the past two months, I switched to Qlaira.
During the medication period, my menstrual cycle has been regular, and I always get my period during the 7-day break.
After stopping the medication on December 7, I got my period on the evening of December 11 (light flow, dark color).
I started a new pack on December 14, but I forgot to take the pills on December 17 and 18.
As a result, I unexpectedly got my period again on December 19 (heavy flow, bright red color).
In a panic, I took two pills to catch up but then stopped taking them altogether.
As of now, December 22, I am still experiencing my period.
I would like to know if forgetting to take the pills for two days caused me to get my period again (isn't it true that missing three days would be ineffective?).
Has my menstrual cycle become irregular? Is it still appropriate for me to continue taking the pills? Should I see a doctor?

Zhen, 20~29 year old female. Ask Date: 2015/12/22

Dr. Lin Wenbin reply Obstetrics and Gynecology

A physician needs to conduct an examination first, and then that physician will determine whether to continue the medication.

Reply Date: 2015/12/22

More Info

Missing birth control pills can indeed lead to changes in your menstrual cycle, including early menstruation. When you take oral contraceptives, they work by regulating your hormones to prevent ovulation and to stabilize your menstrual cycle. However, if you miss doses, especially in a row, it can disrupt this hormonal balance.

In your case, you mentioned that you switched from one brand of birth control pill to another and had been taking them regularly for about six months. After stopping the pills for the seven-day break, you experienced a normal withdrawal bleed, which is expected. However, after missing two pills in a row during the next cycle, you experienced another episode of bleeding shortly after your period had already started.
The reason for this could be attributed to the hormonal fluctuations caused by missing those pills. When you miss doses, especially in the first two weeks of a new pack, it can lead to a drop in hormone levels, which may trigger a withdrawal bleed or an early period. This is because the body is responding to the sudden change in hormone levels, which can cause the lining of the uterus to shed prematurely.

It's important to note that while missing one or two pills can lead to breakthrough bleeding, the effectiveness of the pill may not be entirely compromised unless you miss several doses. However, the risk of unintended pregnancy increases with missed pills, particularly if they occur in the first two weeks of the cycle.
Regarding your menstrual cycle becoming irregular, it is not uncommon for cycles to be disrupted after missing pills. Your body may take some time to readjust to the hormonal changes, and you might experience variations in your cycle length, flow, and symptoms for a few months.
As for whether you should continue taking the pills, it is generally advisable to resume taking them as soon as you remember, even if it means taking two pills in one day. However, if you are feeling uncertain or if the bleeding continues or becomes heavy, it would be wise to consult with your healthcare provider. They can provide personalized advice based on your medical history and current situation.
In summary, missing birth control pills can lead to early menstruation and irregular cycles due to hormonal fluctuations. It is essential to take the pills consistently to maintain their effectiveness and regulate your menstrual cycle. If you have concerns about your bleeding or the effectiveness of your birth control, seeking medical advice is always a good step.

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