Undiagnosed Knee Pain. What is it?

For the past five months I have had excruciating pain in my knees. It is now to the point that I am physically disabled: I cannot walk a distance longer than 100 ft without needing to sit or lay down.

Here are the symptoms:

Swelling in both knees

Baker's Cyst in both knees (comes and goes)

Disabling pain in both knees

Pain continues after resting

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(First couple months)

Knee effusion severe (could not bend or straighten knee)

Had the fluid withdrawn by doctor with cortisone shot (60+ cc's in left knee, 30 cc's in right knee. Temporary relief.)

Had a low grade fever that lasted for about 1 month

Knee would "adjust" to the inside knee (both knees).

By adjust, I mean it would pop on the inner side of the knee resulting in high levels of pain. After a few months, this stopped happening until a month ago when my left knee started popping again.

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More recent

About a month ago I was walking outside and the ground dropped about an inch. This was enough to cause my knees to buckle and hyper flexed both of my knees. Left knee popped once, right knee popped three times. Started to go into shock after this. Uncontrolled shaking. Screamed for about two minutes (those two minutes I can barely remember). Went to a knee specialist and he told me that it was normal, which made sense after he explained why. On pain killers now.

Wrists dislocate occasionally (might be due to me having to use my hands to get up/down)

Tests the doctors have done

Doctors have taken an MRI and X-Ray in both knees. Chondromalacia found in both knees. A possible partial tear in the meniscus, later changed to no tear.

Blood tests were normal.

Negative for hepatitis (all).

Negative for Lyme's disease.

Negative for Rheumatoid Arthritis.

Histone AB Test: 1.1 (weakest positive, tests for inflammation)

Calcium was barely over the range, similar to the Histone AB test

Everything else was pretty much normal (several tests)

Urinalysis was normal

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General Information

Icing has a minimal effect

Taking glucosamine, fish oil, Vitamin C, Slow Release vitamins (no iron), DHA, Acai, and perhaps one more

Pain at all times of the day. Worse at night. Hurts in the morning. Stiffness after sitting for a short period of time.

Must use hands to sit/lay down.

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Waiting to hear from my RA doctor about the blood work. Also had x-rays on both wrists and SI joints to see if there is an infection or something odd.

Now that the general information is out of the way, here is the question.

What are possible diagnoses and why?

Thank you.