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Firstly , you should not have taken ipill
as you would not get pregnant if you have sex in safe period.Days around the menstruation
are safe to have unprotected sex and there would be no pregnancy
You are having side effects of ipill , menstrual irregularities.Do not worry , these effects will settle down in one or two cycles.
There are no chances of pregnancy for you from this intercourse.
Hope I answered your question.If you need more information feel free to mail me.