Can your cycle length change after miscarriage? I had a miscarriage in July. My first period (August) after the miscarriage, last for 7 days (normal). But September, my period last for 4 days. October didn't come period. Now November my period(heavy flow) last for 4 days again. Should I be worry? do shorter periods mean lower fertility? #pleasehelp #firstbaby #advicepls