I took Ella (another form of plan B) last week and it said that I was supposed to get my my period on that Thursday, but it still hasn’t come. I have been having unprotected sex but no ejaculation was released inside. My period is now 4 days late. Is there a chance that I’m pregnant or my period is delayed or irregular?? I want to take a pregnancy test but I don’t wanna waste it if I’m not pregnant.