No Go Wednesday

I did a 6.5k run on Tuesday and started well. Good breathing and felt fine until about half way my right shin started to ache again and I could feel a pull behind my left knee. What's going on? Today was supposed to mark the end of the short runs and I was hoping to be well and truly ready to pick up the higher mileage...
I decided not to go today which means I am no longer on track for 4 runs per week but I will keep at it and see how I can make it up. Tomorrow or Friday will have to be at least a 10k run, Sunday's run is already planned and then I will make a plan of action for the following week.
Signing off now feeling a tad despondant...