Hey LimeWave!

Sorry to hear of your "pains". I may be the last person to throw my two cents in as I am by no means an experienced runner. However, that said, I have completed my first 5k race ever and placed 2nd for my age group (30-34). Along the way in my training there were days that I was tired, aching from disabling shin splints, etc. You really should take a couple of days off to recover. Also, like many others said, replace some of your cardio with cycling as it is way easier on the knees. Also, consider some strength training. I wouldn't be where I am today without it. I used to have terrible knees...so bad that I gave up hope on running. Well, as of today I signed up for an 8k...the next will be a half-marathon.

Good luck to you and take it easy!

RunMamaRun