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

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Where Is The Cervix Relative To A Tampon? : r/Periods

Whats happening to me? : r/Periods

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Not sure what this is but I opened an L brand tampon and all of these particles were inside the applicator. It really freaked me out, anyone know what it could be? : r/Periods

anyone know possible reasoning for this? : r/Periods