Hello Doc, I had unprotected sex with my gf 2 weeks back. she had emergency contraceptive pills 3 times in 2 years. Every time she got periods immediately(within 1 or 2 day). but now  I had unprotected sex with my gf 2 weeks ago and period not coming yet. So please also suggest me with  fruits and water...Thank You..
Emergency contraceptive work if they are taken before ovulation has occurred. As you didn't mentioned the days of menstrual cycle we can't gave you that much satisfactory answer but ECP does not necessarily cause bleeding within 2 days after its intake. But if you had sex after ovulation then chances of pregnancy are there.