Is headache or migraine a symptom of chronic pancreatitis? i know the other symptoms. is there relation between the two?

Not really: Migraines are a separate entity and not related to the pancreatitis. However, and pain/stress can easily trigger a headache; so, in that sense, it could be related, particularly if your pancreatitis is flaring up a little

Not in my experience: I have not encountered that or heard of that correlation before. Typically it's more gastrointestinal related symptoms like fatty stools, epigastric stomach pain that can radiate to the back, nausea, vomiting-all worse after eating- and late in the course you can develop diabetes. Sometimes patients will report general body aches, chills, fever, fatigue with attacks.