Get your health question answered instantly from our pool of 18000+ doctors from over 80 specialties

126 Doctors Online
Doctor Image
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

I will be looking into your question and guiding you through the process. Please write your question below.

Can plan B cause irregular periods?

Answered by
Dr.
Dr. Shanti Vennam

OBGYN

Practicing since :1989

Answered : 7399 Questions

default
Posted on Thu, 5 Dec 2013 in Birth Control
Question: hello, I had unprotected sex on Aug 21st early early morning, twelve hours later I took the Plan B pill. On Sept 5th I got my period. It was regular flow, cramps, bloating and last longer. I have not had unprotected sex since then. Now Nov 13th and still no period. So basically I skipped my period for october and so far no period for Nov yet. I have taken at least 6 home preg test last one was around Oct 30th all negative, I went to the doctor last week because I had strep throat on Nov 5th explained to my reg Dr. my situation and he had me take a blood preg test. That also was neg. My nipples are sensative and my cysts in my breast started hurting two weeks ago but I figured my hormones are all out of wack and I keep thinking that they are a sign that my period is coming. Im on levothroxine also (I dont have a thryoid). I have two kids so I think I would know if I was pregnant especially by now. Im stressed over this and I know this probaly isnt helping with my period. I figured Im not pregnant since all test are negative and by now the tests should be accurate. Can the plan B screw up your cycle like this?
doctor
Answered by Dr. Shanti Vennam 45 minutes later
Brief Answer: So much disturbance has not been noted usually. Detailed Answer: Hello, Thanks for writing to us. Emergency contraception is very much effective when it is taken within the stipulated time interval. As it contains excess hormone, it tends to disturb the menstrual cycle as the hormonal balance is tampered with. The usual menstrual cycle may be delayed by about a week or two after inducing a withdrawal bleed a week after ingesting the pill; prolonged absence of a menstrual period calls for further investigation. In the current scenario, I would suggest a complete evaluation by a gynecologist along with a trans-vaginal sonogram. Since pregnancy has been excluded through a blood test, you may be going through a phase of hormonal imbalance and you would need a complete hormonal profile including the thyroid profile. Your symptoms point to hormone excess and stress could be adding to all. As far as my experience goes, Plan B does not cause so much of disturbance and you need to be investigated to manage further. Please maintain a healthy weight, some form of regular exercise and a healthy diet. You may need hormones for inducing withdrawal bleeding and later on for setting the cycle back on track. Hope your query has been answered. Please feel free to contact for further clarifications. I will be happy to help. regards, Shanti.V.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
premium_optimized

The User accepted the expert's answer

Share on
Question is related to
Diseases and Conditions ,  
Drug/Medication

Recent questions on  Combined oral contraceptive pill

doctor1 MD

Hi, I am currently trying for a baby. I have only been off the pill since the beginning of May, after I had just finished a period. A few days later, I bled again. I have had unprotected sex a couple of times and I now feel bloated, constipated, my nipples are becoming more and more sore. I am also weeing a little more than I used to. I know it s quite early. I have done a few pregnancy tests and they have both been negative. Ovulation tests have also been negative, so I don t quite know what the think. Could the body changes be due to coming off the pill? I didn t have these symptoms last time I cam off the pill though. Thanks, Kelly.

doctor1 MD

Plz suggest is it save to have unwanted 72 or i pill in 2consequtive days. I had sex with my bf in the morning without any protection. I have taken the pill yesterday only at night as we had sex yesterday also. Now do i need to take one more pill today? And is it safe to have one more pill?

doctor1 MD

I have been peeing quite a lot and this is the second time I ve taken the pill (second packet if tablets I ve taken) but the first pack of tablets I didn t need the toilet as much as I do this month. I have been on my period though but only for 5 days. I am taking the mercilion pill, is this a normal side affect?

doctor1 MD

Hi I have taken levonelle twice in one cycle had my period on the 19th of June and it finished on 25th of June has sex on the28th and took the pill about 10 hours later, I then had sex on the 5th of July and took the pill on 8th of July what are my chancesof being pregnant please

doctor1 MD

i am currently on depo provera and have bled for weeks non stop i will be going on holiday soon can i take norethisterone to stop the bleeding? And will this prevent me from bleeding during or after sex? i will be reunited with my fiance after not...

doctor1 MD

Hi I am XXXX. I had sex with my girlfriend last month Oct 14th,15th and 16th. She first took a contraceptive pill considering we have done for all. But again we made love within 4 hours of her taking the pill. so I forced her take another pill too...

doctor1 MD

Hi I'm XXXX.37 yrs old. I have 2 kids...my problem is irregular and painful periods. ..Dr. suggest me novelon tablets. ..I'm taking novelon 3 days but till now periods on..why