Patella Tendonitis

Go see an orthopedist if the person you saw was a primary care doc.  If you saw an orthopod get another opinion.    There are some braces you can try, PT to be done and topical NSAIDs you can try.  If you need an orthopod PM me you location and I maybe able to suggest someone for you.

I've had it, too.

Stretching and strengthening your quads is the answer. See this link: http://www.med.umich.edu/1libr/sma/sma_jumpersk_rex.htm

I continued running through it using a strap that went on the lower part of my knee (where the pain was; rather than the typical IT band strap that is on the upper part of your knee...that didn't work for me). When the pain subsided, I ran without the strap, but carried it with me just in case.

I don't think you need to stop running. Maybe run less. And avoid eating IB like candy, please. That's just not good for you. And actually, the pain will help you decide how much or how little you can actually train.

Have patience. It should get better.