Period/pregnant

aleshia

So according to this app I was supposed to start my period on the 20th, that never happened. I thought this was strange since I am usually 1-2 days early every month, I am still yet to have it. The app now says I should start the 23rd. Should I wait a couple more days before I take a pregnancy test?

Update:

So my period was scheduled to start today and still hasn't.....when i told the app it didn't start it changed the start date to the 25th......should I be worried now???