I have pain/stiffness in all my finger joints aside from my thumb in both hands. i can't identify any cause such as an injury or overuse. it was a sudden, unexplained onset 2 weeks ago. it's worse in the morning. should i go to my doc?

I recommend consulting a rheumatologist to get a handle on what could be onset of rheumatoid arthritis. Appropriate testing will be ordered and proper treatment options reviewed.

Yes. Your symptoms warrant a visit to a doctor, preferably to a rheumatologist, though you may start with your primary care provider for an initial assessment and laboratory tests. Wish you good health!