If the doctors don't seem concerned then I'm assuming your MRI/CT scans were normal neurologically.
The worry here is TIA vs. migraines. It's debatable, but migraines with auras put you at higher risk of stroke. If you're having TIAs, then that's a real warning sign. However, if the neurologist did not find any neuro deficit, then it's likely not TIAs.
How is your blood pressure?