If you were my patient, I would advise you that you can have relations with your husband as soon as your bleeding stops. You may be able to conceive on the very next cycle. You should expect your period within 4-6 weeks after the miscarriage. (If your periods were regular before the miscarriage).
I sometimes consider an early miscarriage to be a good sign that everything is in place for conception to occur. In my experience, many couples conceive again soon afterwards.