When should you expect your next period if your last month was later than normal?

This is difficult to say as your previous period was later than normal for you which is an indication of a irregular period. When you have irregular periods you will only roughly be able to estimate your period due date. You may find that your next period is spot-on 28 days (or whatever is regular for you) Many women are not absolutely 28 days it may vary 26-30. I was a regular 35/36 days before having my first child, then came down to 31 days between pregnancies. Both times I got pregnant at the first attempt.