my period length has suddenly doubled. is this normal?

my period usually lasts 3-4 days. i’ve never gone a full week with it. i’m now on day 6 of my cycle and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> says today is my last day. yet again they said 2 days ago would be the end. i’m still bleeding a lot and my period is usually really heavy but it dials down at the end. i’m really concerned and i don’t know what i should do. help!!

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