Irregular periods after miscarriage

I've always had a regular period. Then hubby and I found out I was pregnant in July but we lost the baby at 7 weeks.  After my period came again, it was a pretty regular 28/29 day cycle until last month when I got it on day 34. This month I'm on day 35 without my period. Anyone have a similar experience?  What should I do as far as the predicted period goes?  Just keep pushing the period back day by day in the edit feature?