<s>[INST] Hi, my cycle is a normal 28-29 days cycle. Which probably was 3-4 days after ovulation. Ive had protected sex on 23rd Oct and took an ipill within 50 hours just to be safe. I got my periods on 1st Nov which was exactly 28 days from my previous cycle. But my second month has been delayed now, counting from 1st Nov I should have got my periods on 28-29th Nov. But still haven't gotten it. Is it the ipill or could I be pregnant? [/INST] HelloThanks for writing to us with your health concern.THe I pill is known for altering the normal pattern of your menstrual cycle.It can prepone or postpone your expected cycles by upto a week.But this affect generally does not persist beyond a month.What you are experiencing this month is probably not related to the I pill.Make sure that pregnancy is conclusively ruled out.ALso, stress, anxiety, emotional turbulence, weight gain, hypothyroidism, polycystic ovarian disease, change in sleep or diet habits - all these can cause a skipped period, apart from pregnancy.If you do not menstruate within a week more, and pregnancy is ruled out, then you would require a gynecological evaluation to know the cause.Take care. </s>