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Abnormal periods after Unwanted 72 pill ?

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I am 24 had unprotected sex( but sure that my BF had taken out before he started to ejeculate) took Unwanted 72 Pill after 6 hrs of sex. after 10 days i got light periods and after a week I got full periods 3 days of Normal Periods which I used to get previously in OCT. in nov also I got light Periods for a week ( just bleeding) but after that again got 3 days of NOrmal Periods. in DEC also I got light periods BUt didnt get normal periods yet.. last time I got normal periods was on NOV 25th .. I am very nervous. Do i have a chance of getting pregnant after 2 full cycles of normal Periods? also anything to worry as I got light periods and after some delay of 3-4 days I am getting Full periods?

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replied January 4th, 2011
Birth Control Answer A18183
Welcome to ehealthforum.
The emergency contraception if taken within 72 hours of unprotected intercourse will help to prevent pregnancy (pregnancy can occur even with pre-cum or pre-ejaculatory fluid since it is known to contain sperms). The withdrawal bleeding and periods thereafter suggest that chances of pregnancy are not there.
Sometimes periods can be delayed for 5-10 days due to stress, change in lifestyle, food habits etc., so wait and see if your periods start in another few days time. if you suspect pregnancy to be the cause of delayed periods with the light periods being decidual bleeding, then you should consider getting a thorough evaluation done by your gynecologist along with ultrasound scan and blood tests to confirm/rule out pregnancy.
Take care.

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