Thanks for requesting me: you can do that any day of the week.
If her period is past due, and the test is an up to date test, it should be accurate.
I would repeat it to make sure there was no error.
Such bleeding, when not pregnancy implantation bleeding, is most often hormonal.
Anything that disrupts the normal balance can cause this, from stress to thyroid problems, liver and kidney problems, weight loss and weight gain.
This should prompt an exam from her OB, to rule out fibroids, endometriosis, infection, etc
Low chance of pregnancy, but a blood test is foolproof.
OK, so that is an initial answer….
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