HELP !was supposed to start my AF the 23rd

Hailey
So the day b4 the 23rd I took a PT in hopes for a BFP! But nothing, BFN:( so I was ready for AF the next day still nothing so I set the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> and now it's saying the 29th should I just wait to see if AF starts or should I take another test on the 28th?? 

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