Tendonitis experience?!?! GOLFERS ELBOW, cortisone shots help please!?

I have tendinitis in my right knee from running track. I had physical therapy and cortisone shots. I wasn't able to even jog (not run... jog) for 4 weeks and then after that it went to a light jog, only able to do 1/2 mile per day (docs orders) and then about another 2 1/2 weeks before I could actually run on it. I know its frustrating, but just hang in there!! Hope this helps!