well done blackvault.
Don't be afraid to increase the distance though. What tend to work well is keeping the distance the same for 2-3 (so 5K,5K,5K), then push the distance up a little each week or 2 or 3 weeks (so 5.5, 6.0, 6.5km) , have a cutback/easy week (runs no longer than 4.5-5KM), and go back to the 6-6.5KM for 2-3week, progress again (70.0,7.5,8.0).
The pattern is to increase distance progressively, recover, then hold steady at the new high value so your body adapts, then start progressing again. This applies to the distance of your longest runs, but also the volume of running in a week should follow similarly. You can look at work/vacation schedule to see when an easy week makes sense.
Some coaches talking about not increasing volume/long run distance by more than 10% a week. there is no science behind that and it misses some important aspects that reduce injury risk. you can easily increase volume or distance by more than 10%. However, increases of 10% continuously will simply lead to injury. You have to have easier/cutback/recovery weeks, and you need to leave time for your body to adapt to higher levels.