One day off and one visit to the doctor and my concerns about a possible hernia have been eliminated. The doctor did a quick check and made the definite determination there is no noticeable hernia. Though he offered a visit with the surgeons, he indicated that they would be unlikely to do anything without an obvious problem.
His guess is a pulled muscle in the same general area. Apparently, a pulled stomach muscle can create pains very similar to that of an abdominal hernia. Thanks, WebMD, for failing to mention that in your write-up about stomach pains.
Oh well, better to visit the doctor and get a clean bill of health than to self-diagnose and miss the mark.