Need adivceee !!!

I have been trying to conceive with my fiancee sense May ! My last period was December 4th to 9th , my next period was supposed to come January 1st according to the apps i have (which are always 100% accurate for me!) and i have not gotten my period yet .. i took a test today (2days late) around 10:30am and it was negative . Should i retest inthe morning or wait a few days and see if i get my period? I’m just confused because my trackers are always on point .