When to expect a period after miscarriage

Hi guy hope you all are well..so this is very difficult for me to talk about but I had a miscarriage 3 weeks ago.My husband and I are really looking forward to starting our own little family we are so anxious and scared of the next pregancy and also when can I expect my period after a miscarriage its been 3 weeks already..so confused.Thank you for responding goodluck ro all attempting to conceive God bless!