The waiting game

I’m 2 days late for my period according to another app I use that was right last month for my predicted period date, the 13th. This one for some reason says the 18th even though I have been logging. Since I have been off birth control I have always gotten my period between the 12th and the 14th never later. Should I take a pregnancy test? I don’t want to jump the gun and get discouraged 😕