After a miscarriage, you are likely to have one or two abnormal menstrual cycles until your ovarian function works with normality again. This means that you can have shorter or longer menstrual periods. If you have a short menstrual period, you could get pregnant. Get more info here: Is It Actually Possible for You to Get Pregnant While on your Period?
Suggested for you: Pregnancy After a Miscarriage or Abortion – When to Conceive Again.