Are you seeing any improvements with what you are doing?
What did the doctor say about the soft lump?
May need to see a different doctor to determine what is going on.
Have you look up/downstream of the knee?
Have you had anyone look at your running mechanics?
This maybe where the issue originates. You want to look at movement patterns first.
You are able to buffer the deviations in technique for awhile until your body says no more then its game over.
Have you done any mwods that address the patella?
Pro Episode # 31 – User Request Friday – Live from The Games: Patellar Tendonitis
Voodoo Band Your Patella Femoral Pain
Wonky, Beat Up Joint? Feed That Thing Good Mechanics and Some Slack
Episode 344: Compression Tack and Floss–The Knee
Episode 33: FGB Push Press Prep ; Hot Patellar Tendon: Hip /Calf/ Hamtsrings
Episode 305: Solving Problems With The Tunnel: The Foot Strike
Some places to start.