Hi, Well! It depends from person to person as every person is physically different and each's hormones work differently. But in normal recovery, one may get regular periods 4 to 5 weeks and it may struggle and would come only after 7 weeks. The period may be heavy or light depending on individual's hormonal functioning. It all happens because of body's attempt to regulate its hormones again. For more information about how all it works, you can go through this informative link below. http://www.pregnancyloss.info/waitingforaf.htm
You should only expect the next period to come at least four weeks after miscarriage as the cycle is starting all over again. Anything from four weeks to ten weeks is normal. Usually will be within 6 weeks