Hi So as you probably know, no form of contraception is guaranteed to prevent pregnancy however their use minimizes the risk of conception. Among those, regular contraception in the form of the daily pill is the most effective. As you have taken an emergency pill there's still a chance of pregnancy. Also be warned that you will most likely experience irregularities in your menstrual cycle for a few months. The only way to rule out pregnancy in a confirmed manner is to do a blood test namely the serum beta hcg After 2 weeks from the date of sex and share the report.one can't rely on the symptoms of pregnancy to decide whether or not that is the case.