Hey Sony3,
I don't know whether this is going to help you at this stage, but it sounds a lot like you have "Runner's Knee" aka "Iliotibial band syndrome". I have found that a few of my athletics buddies (myself included) often suffer from this complaint after coming back from injuries too quickly. Or changing their programme's to include lots of downhill running. Are you tender on the lateral part of the knee near the insertion of the ITB on the tibia?
In a case as irritable as yours, you may be best to minimise your kilometres and commence a stretching programme for the ITB/TFL and strengthening for quads and glut med with gentle walking added to allow the irritated tissue to settle, for about 10 days, and then start slowly introducing small runs every second day to build up running fitness. If possible also avoid bitumen/asphalt roads until the pain starts to settle down. Ice is also particularly helpful to control irritation immediately after running. Ice for 15mins, then a short cool down walk.
Hope this helps