hi i had gone through your query and understand your concerns. i would come up with the possibility of HYPOTHYROIDISM
is the underlying cause for your sufferings.
the patient who are suffering with hypothyroidism are prone early degenerative changes in the bones.
other possible causes
-RHEUMATOID ARTHRITIS;confirm with blood test
for RA factor,CRP,ASO trite,and ESR
-GOUTY ARTHRITIS, confirm with blood test for SERUM URIC ACID LEVELS.
wishing you good health