I started charting again just a fews day after my miscarriage. My temperatures were all over the place for a week or so, then dropped to my usual pre-ovulation levels for a few days, then rose to my usual post-ovulation temps. Basically, weirdness for a week and then a pretty normal looking chart, and just started AF yesterday right on time according to the chart, so I guess I ovulated. Now I'm counting down the days until I ovulate (usually the same day every month) so we can try again!
Hope this helps, I was wondering the same thing right after my miscarriage.