Late period.

My ferfile window is 21-27 of Dec, my boyfriend was over on the 5th and 6th of jan and we had unprotected sex multiple times. I am currently two days late for my period. I am wondering if I could possibly have gotten pregnant even though the eve app says I wasn't ovulating around that time. Do all woman ovulate two weeks before their periods? I'm not too worried about it, but I'm just curious of the odds.