Had painful colonoscopy yesterday. no pain afterwards. does the pain felt during procedure increase risk of perforation occuring later? very anxious.

Very unlikely: It is very unlikely that your gastroenterologist missed perforation and let you go home. It is even less likely to have a perforation and not be severely ill 24 hours later.

Relax: Perforation is a rare complication that occurs during colonoscopy and most often in the frail and elderly. In the majority of cases the doctor knows a perforation has occurred right then. You would not have been sent home. In the extremely rare circumstance a perforation occurred and was not detected you would develop abdominal pain that would get increasingly worse with possible fever.