period after miscarriage

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so i misscarried in nov of last year i was 12 weeks. my periods have been back to normal but they last 6 days now and are heavier then they were before i got pregnant. they used to last 4 days and weren’t that heavy, just medium i would say. is it normal for your periods to change like that? i’m assuming it is but would just like some more advice from people who have been in the same boat as me. i know pregnancy and after can change your body enormously.