What is the next procedure after having a colonoscopy?

Too vague: Depends on what was its purpose. If it was for screening and nothing was found, usually that's it. If it's to evaluate a particular problem like bleeding, your doctor will decide what other tests to do. Of course, if the colonoscopy finds something, there may be treatment offered. Always know the purpose and the results of any test you get. If unsure, ask the doc.