Question about bowel obstructions. I went to ER with all symptoms nauseau, vomiting, abdominal pain no BM for over 1 week. CT was negative in April. Happened again for over 1 week . .can bowel obstructions be missed on CT? I've been ill since April and all tests and bloodwork are normal. Maybe I should try the liquid diet for several days? I have had stomach problems all my life but this year everything has escalated. Constant avdominal back pain is exhausting. Next step colonoscopy?