One thing that people overlook when trying to improve their work ergonomics is where they are resting their hands and elbows. You can subtly pinch the nerves in both your hands and elbows leading to restricted blood flow and eventually pain or numbness.

I had pain/numbness in my ring and pinky fingers a few years ago that was progressively getting worse. I switched to a Kinesis Advantage keyboard and left-handed mouse but only saw modest improvements. It was only after nearly a year that I realized that I had been resting my elbows on my chair all day, and that was pinching my ulnar nerve and restricting blood flow. After lowering my elbow rests, I saw an dramatic improvement within weeks. Today I have zero issues.

I never saw a professional, but may have saved myself a lot of pain and worry if I had.