Three days late; negative hpt

redvelvet_94 • 25yo grandma 👵🏼
I had protected sex (condom) on June 3rd; my last period was may 29th-June 1st. As far as I know, the condom did not break or leak. I saw him take it off afterwards in one piece so I figured I had nothing to worry about. Plus I wasn't in my fertile window. 
Well flash forward to the end of this month, June 29th, and I am three days late according to glow. I don't have any symptoms, other than my boobs being a bit sensitive and a late period. I took a pregnancy test and it's clearly negative. 
I'm not sure what's going on; an hpt is over 99% accurate at this point and I trust the results, but why haven't I gotten my period? 

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