Hi Scarlett,
I am sorry to hear about your miscarriage, but am glad that you have found this site- I hope that you find it as supportive as I have.
My first period took it's time to arrive (I was very impatient), but my next one came after 33 days, which is usual for me. I have been told that they should go back to normal after the 2nd, but I agree with AJC that stress can be really important. Don't worry, I have heard of loads of women whose cycles have been a bit of a mess for up to 6 months following m/c. The way I see it is that a miscarriage is a really stressful event (emotionally and physically), so it's no wonder that things dont bounce back to normal straight away.

Were your periods regular before you miscarried?

I hope this helps, good luck. x