Its important to ascertain the giddiness you describe is actually not minor episodes of seizures.The headaches
may be associated with it.Please get the opinion of the Neurologist
who will be able to rule out Seizures and decide whether you need to start on medications again.A repeat Brain Imaging might be necessary to determine about Granuloma
or other causes which can lead to seizures.
Also keep a close watch on the Blood sugar levels as increased blood sugar levels alone can precipitate Seizures.Hope this helps!