my period has never been late 😣😣

My period has never been late ! My last period was on April 23-29 and I was scheduled to come on again May 20th but it never came on!!! I also have another app besides glow because glow can sometimes be inaccurate but anyways it says my period is 2 days late 😩😩 what do I do? I need answers !!! Do I need to wait and retest again! 😔 my husband and I are really TTC!!!