On one of my midweek runs (such as Tuesday), run from 30 to 60 minutes. It would help to run a 4-5K segment in the middle of these runs experimenting with 2-1 for a kilometer, and then 3-1. Try to run a pace of 5:45 to 6:00 per km.
On the other mid-week day, find a 1600 meter segment (1.6K) and time yourself. Run at a faster pace than other runs, but not all out.
This will give us a good chance to predict pace for your race.