Hi Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern...
Yes intake of I pill can cause delayed periods, It is a common side effect due to high dose of
levonorgestrel in the pill. Therefore your periods might be delayed or 1-2 cycles.
I-pill is an emergency pill which prevents pregnancy by inhibiting
implantation of fertilized egg on the uterus. It is 95% successful if taken within 24 hours of having sex.
As you have taken i pill within 13 hours of having sex, now you should relax as pregnancy possibility is less.
Use condom or regular
contraceptive pill as method of
contraception in future. Regular taking emergency contraceptive pills can cause problems like
irregular periods, ovarian hyper-stimulation syndrome & even infertility.
If your periods gets delayed by more than 2 weeks, you should also do a pregnancy test to rule-out pregnancy possibility
Refer to a gynaecologist
Hope this information helps