When to test again?

I took a test on Sunday, 3-5 days BEFORE my period, it was 100% Negative. I got a blood test for something unrelated on Tuesday, I assume if they seen anything they would’ve said something, so I’m gonna say Negative there too. That was 1-3 days BEFORE my period. I am now 1-3 days LATE, with no sign of period coming.

Should I test in the morning? Or wait until I miss period completely?

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