No, you shouldn't expect AF tomorrow, although anything can happen after a miscarriage. Generally, your luteal phase (after ovulation) should be 12-16 days long. Shorter than 11 days indicates a luteal phase defect if it occurs during a regular (non post-miscarriage cycle). After a miscarriage, it's common to have a non-typical cycle. For example, I'm just finishing my first cycle after my October miscarriage, and I didn't ovulate until CD 24, when before it's usually around CD 16 for me.
Here's my chart:
27c4b Ovulation Charts
I should say, it's common to have your typical cycle length change for awhile after miscarriage, not just the first one. Best of luck to you!