I had never experienced constipation until I had to start taking many medications for heart and Parkinson Recently I had a issue with constipation and after finally resolving that I had about 15-20 minutes the following day of some of the most severe pain ever. I compared it to what I call gas pains only it was constant. After the pain I went into diarrhea for about eighteen hours Just below my belt line I had pain all the way across for several hours, the next morning I was much better. I took stool softeners and Dulcolax for the constipation. I have had gas pains as severe but only for moments, this was constant for 15-20 minutes, I have been having trouble with my gallbladder and do have gallstones This pain was not the same as any of the gallbladder problems I have had, anyone experience this?.