I've been getting brown discharge for almost a week. Should I be concerned?

Some details: I am 14 years old, my period is due in a couple of days. They're usually quite regular, since I started my period almost three years ago. I'm not sexually active and never have been. I've been getting quite light brown discharge on and off since last Saturday, so 5 days ago. This has never... show more Some details: I am 14 years old, my period is due in a couple of days. They're usually quite regular, since I started my period almost three years ago. I'm not sexually active and never have been. I've been getting quite light brown discharge on and off since last Saturday, so 5 days ago. This has never happened to me before. Should I be concerned or is this normal?
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