Nearly black blood on a tampon left overnight on day 4 of period

Black Discharge: 7 Causes, What It Means, How It's Treated

Period day 7, period is not stopping and my periods are usually 5 days long (see description and comments) : r/Periods

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Free the period: Why some women choose to free-bleed

Blood test results?? : r/Periods

How long can you keep a tampon in? - DAME

How Does a Tampon Work?, OBGYN in Edina and Burnsville, MN

Is this normal? My period was really late and it started like this now it's clotty and really painful. I'm worried it could be a miscarriage what do y'all think. : r/Periods

What does this discharge mean? : r/Periods

What does the colour of your period mean? – FlowCup Menstrual Cup

Dark Brown Discharge Instead of Period Blood - Why?