hi and very pleased to answer you
Emergency
contraception allows in most cases to avoid pregnancy when taken within 72 hours after intercourse.
It can be used after
unprotected intercourse, contraceptive failure, defective use of a contraceptive method or sexual assault.
There are 2 methods of emergency contraception: the pill (PCU) or morning-after pill and the copper
intrauterine device (IUD).
Inserted within 5 days of unprotected intercourse, the copper IUD is the most effective method of emergency contraception.
WHO recommends one of the following drugs for emergency contraception:
A dose of
levonorgestrel of 1.5 mg, or a dose of ulipristal of 30 mg, administered within 5 days (120 hours) of the unprotected sexual intercourse; or
Two doses of
combined oral contraceptives (also known as the Yuzpe method)
The consequences that can occur depend on the dose of the compound:
Nausea, vomiting, headache and menstrual delay or irregularity (what you had).
In this regard, the World Health Organization (WHO) has stated that the
emergency contraceptive pill in cases of frequent use results in side effects such as menstrual irregularities.
These medicines used to prevent pregnancy belong to a group of hormones called
progesterone, which are administered in 1 or 2 tablets per day, depending on the brand, within 72 hours after intercourse, Action of these drugs is "inhibit ovulation and prevent fertilization with it."
These resources should be used in very specific situations, such as: rape, unplanned sex, broken condom during intercourse, expulsion of intrauterine device, irregular birth control pills, or The delay in the implementation of the birth control plan. "Of course, it is very important to know that the reports should be, in these cases, in the days of ovulation as possible,"
So I do not think you have pregnancy because:
1- Suspect sexual intercourse is far from ovulation.
2- The method was followed (taken within 72 hours of the report).
3- You have a delay of menstrual bleeding induced by taking the emergency contraception not by the pregnancy.
WHO advocates 5 days, but most gynecologist 3 days (72 hours)
best wishes