Will contraceptive pills worsen pre-existing irregular period?

Hello,

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I have gone through the details and the sequence of events you mentioned and totally understand your anxiousness. See, the emergency contraceptive pills are high doses of progesterone hormone, so at times there can be withdrawal and sometimes there can be a delayed period too. The effects vary from a person to person. As you already had a history of irregular periods, it is difficult to predict just based on the sequence of events whether you could be pregnant or not. So a definitive test would be to check for a urine pregnancy test, preferably with an early morning urine sample. If that is negative, then you can rest assured that you are not pregnant. And you can take the medications mentioned below to get your periods and get yourself evaluated for the cause for your irregular periods. Regarding your irregular periods, I see that you are slightly overweight for your height. So mostly this could be due to PCOS (polycystic ovary syndrome) too that you have your irregular periods which need to be evaluated or maybe some hormonal changes in thyroid or prolactin hormones. You can tablet Meprate or Deviry 10 mg (Medroxyprogesterone) twice daily for five days and then stop. You must wait for the withdrawal bleed within next 7-10 days. Get blood tests done on second or third day of periods.