Pain in lower left quadrant of abdomen (male)

I have been suffering from lumbar spinal stenosis for a few years, worse on the LEFT side. The pain is controlled by gabapentin since PT and acupuncture did not help a great deal, Eight months ago I developed very severe shingles on my inner LEFT thigh. I now have post herpetic neuralgia that causes numbness and burning again on my LEFT thigh. Recently I started having pain in the lower LEFT quadrant of my abdomen after a few bouts with chronic constipation. CT scan showed mild diverticulosis, so I am eating a high fiber diet. The pain is intermittent. I believe that in addition to the diverticulosis, the post herpetic neuralgia and the lumbar spinal stenosis are causing some of the pain in my lower LEFT side. Bowel movements are now normal. I would appreciate your thoughts.