Swollen, sore red joints 1st 2nd finger joints-other painful areas: jaw, hips, bones in top of feet...neck .also have fatigue.. could this allbe oa?

Need to distinguish : It sounds more like a rheumatoid arthritis. See a rheumatologist for proper diagnosis and treatment.

Doubtful: You should see your internist or a rheumatologist for further work up.

Varies: May or may not all be from same cause, if it is it suggests something more systemic. A good medical checkup with some basic lab work would probably be a good place to start.