Is your stomach extended and hard? Have you vomited? These are the signs when my daughter has a blockage, distended abdomen and waves of pain. She finds walking and even getting on her knees and butt in the air and swaying from side to side sometimes helps. I think I have read on here if you start vomiting a lot you may need to head to the ER. I don;t know about the warm water, but it sounds like it could help.
Maybe someone else will come along with more to add.
Hope is resolves quickly.