Hi. Me Nd My Boyfriend Had Sex Four Times On

Hi. Me nd my boyfriend had sex four times on 18th February nd also on the 7th day of my period..he ejaculated inside me..I took emergency pill postinor nd I was supposed to have my period on 11th March but still not having it it's been 14 days..took pregnancy test at home but couldn't get the result don't know what went wrong.. Would you please help nd tell me what medicine I should take to have my period? I went to see a doctor today but my area's medical was closed for Easter holiday.. Please help!!