How late did you take ella one? Did it work?

So I had sex on my ovualtion day which was this past Friday, July 15th 2016 (at 2am). I had unprotected sex and I'm not on birthcontrol. I forgot to go to get the doctor Friday because I had to work. So I went this morning to get the ellaone (emergency contraceptive) and I took it around 12:30 pm. So it was 82 hours after the sexual act. Has anyone gotten pregnant after taking ella one past the 72 hours? Just a little nervous about the possibility that I could still be or get pregant.