catscan, mri have been done, nothing found. this has been going on since 14yrs old, now 20yrs old. they come and go, sharp pains.
While we cannot diagnose what type of Migraine or headache disorder you may have, only a qualified doctor can do that, we can provide you with information and support.
There is a type of primary headace disorder called Ice Pick headache that has short, stabbing, shooting pains as one of its symptoms. You can read more about this in the article: Ice Pick Headaches - The Basics.