Not even sure anymore , late period? Pregnancy?

Ruby

Two different apps . Started my period April 20th-24th . It shows I ovulated later on one app than the other ? Me and my husband did have sex on various days just doesn’t show it because I would forget to put it in the calendar . And we have a 15 month old . Could this be a late period? Or pregnancy? I was supposed to start my period maybe a week ago.