You can create custom Date Ranges. I recommend these two. They will capture the same whole days this week vs last week. I.e. Sunday through end of yesterday. You don't want to include today's data because the same day last week was a complete day, whereas today's data is incomplete.
Last Week:
- Start: Start of current week minus 1 week
- End: End of current day minus 8 days
This Week:
- Start: Start of current week
- End: End of current day minus 1 day