Hi Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern...
Delayed period nor missed period after intake of ipill is a common problem. It is known side effect due to high dose of hormone levogesterol contained in the pill. Emergency pill like ipill is not 100% effective. It is 95% successful if taken within 24 hours & 70 % successful if taken 24-72 hours.
Actually ipill is a
emergency contraceptive pill & it should be used just in case of emergency. One should never use them as regular method of
contraception.
Use condoms or regular contraceptive pills to prevent
pregnancy in future. As you have taken 2 pill sin short time of span, Taking more emergency contraceptive pills can cause serious problems like
irregular periods, ectopic pregnancy, ovarian hyper-stimulation syndrome & even
infertility.
You should also do a pregnancy test to ruleout pregnancy possibility.
If your period doesn't occur even after 7-10 days, Consult a gynaecologist
Hope this information helps