Skull fracture when i was younger, severe headaches/migraines recently. related?

Possibly, depends: The degree of the skull fracture and associated head injury is an important factor in determining if your current symptoms might be related. The more severe the head injury , the more likely your current headaches might be related. It is known that patients who have severe head injury are at increased risk for delayed sequelae-ie. Hydrocephalus, cognitive issues. You should have this checked out.