Thanks for your post.
and stomach pain can occur due to fecal impaction
,in which feces or stool will harden at this critical juncture in the bowels and cause a blockage. Laxatives are generally used to help relieve short term constipation.Anti spasmodic like cyclopam, colonic irrigation and suppositories may be needed.
continue taking healthy diet and exercise.
I am glad you are quitting alcohol which may cause peptic ulcer
and stomach pain.
You need to visit your doctor and rule out irritable bowel syndrome
and peptic ulcer and management.
Hope it helps.