AF 5 days late... Where is my second line?!?!? Ugh

Amanda • Just turned 30, trying to start a family with the love of my life. Together 9 years, happily married for 1.5!
Glow calculated my period to arrive last Sunday 4/26 but if you go by my normal 31 day cycle, it at least should have arrived by Tuesday 4/28. I have so many physical symptoms; including nausea that comes at 7pm everyday like clockwork! I just need answers!!!! Either AF or my second line needs to show soon!! How common is it to still be pregnant at this point and not even have a faint line? 
Thank you all for your support in advance! 

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