Has anyone else...(tmi)

Had painful stomach pains followed by diarrhea? I have been having it once a week sometimes 2 and the pain has been so bad I feel like i could pass out...I have to remember to breathe. The stomach pains...nothing I have ever felt. They go away after the diarrhea. Anyone else experience this? Is there something I can do to take away that pain before I go to the bathroom? It's about unbearable.