Hi Wendy,
Every individual response differently. Gynae normally say it takes a couple of months for body to function normally. So, when the 2nd AF will report, very difficult to predict. I think gynae also not able to answer this question.
For me, my AF used to be 27-32 days. But after mc, something good happened is that AF report every 28 days. At least not so haywire.
I used to take medicine to delay AF in the past, I know its not good cos the next few cycles may be affected. Perhaps you can check with gynae on this .