is this normal?

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i’m 14 & i have been on my period for 5 days, usually i only have them for 3, but it is still super heavy and no where near stopping. i have a heart problem & my periods are normally heavy so my mom got me birth control for those reasons.. i’ve only been on it for 2 months so could that be a cause of it being this heavy? i bleed through super tampons under an hour & i’m clotting so much. should i be concerned?