Late...

So I took the ella plan b pill like 2 weeks before my period which was supposed to start 5 days ago... it says I'm 5 days late and I'm really starting to stress out... I had taken the pill because he could feel the condom break and as he pulled out he came in his hands (gross I know) but I took the pill because he said he wasn't sure if any got inside me or not. I'm not on birth control, just use condoms. I'm really nervous that the pill didn't work... or maybe the pill is making my period really late? Is this normal to be this late???