Is it normal for the first period after a miscarriage to be heavy?

Yes: The first period after a miscarriage can be heavy. if you are going through more than a pad every 2 hours or are feeling lightheaded or dizzy, call your doctor.

Irregular Periods: Menses after an alteration in the normal cycle of hormones can always cause irregular periods from barely existant to very heavy non-cyclic bleeding. Stopping birth control or interruption in pregnancy can cause irregular vagnal bleeding.