8 days late NEEEEEDD ADVICEE

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I have a regular cycle of 28 days, and comes like clockwork. I was supposed to start September 20 and it was 8 days late. Then on September 28th i had light bleed thinking aunt flow has started. So all day its been very light around 430 it look like it has stopped. I am confused should i take a test or wait to see what mother nature does?? PLEASEEE NEED ADVICE