Knee pain when kneeling

Well. I have been to orthopedic doctors and a podiatrist.

I am in my thirties

All my bones are great no arthritis

I do overpronate and have flat feet. This is new

The problem:

When I don't wear orthotics I have severe hip knee and ankle pain. 800mg motrin helps. The odd symptom is when I kneel I have pain in my knees the rest of the day. My knee bones are fine so I don't understand.

Can't the podiatrist give you orthotics?

Hate to say it but I had lots of knee and leg pain in 2009 until an ortho did an MRI of my hip with contrast.  Showed that 30% of my hip was necrotic (dead) and that my leg/knee pain was radiating from my hip.  Replaced, rehab, no more pain.  Consider it.