A On Nov.20,2015 I Took A Laxative For Constipation, It

A On Nov.20,2015 I took a laxative for constipation, it was no results, onNov.21,2015, I took a Linzess tablet for the same reason, no results, on Nov.22, 2015, I took a dose of Lactulose 20 GM/30ML solution, I had results, after a few bowel movements, I felt fine, on Moinday Nov. 23,2015 I had a watery bowel movement early that morning, afterward I started havng a lot of gas pain in my stomach, I could burp and pass gas but the pain continue,when I eat it hurts, when I do not eat it hurts, this is still going on as of right now. Do you have any suggestion of what might be going on?