Carotid Artery Disection (CAD) often causes no symptoms at all even if it causes complete occlusion because the other carotid artery (there are 2 carotid arteries) provides the brain with enough blood.

CAD causes symptoms when a blood clot forms on the place of dissection and then rubs from the artery wall. The rubbed clot goes into the brain circulation (thromboembolia) and sticks in a terminal brain artery causing an ischemic stroke (brain infarct). An ischemic stroke causes permanent brain damage.

Sometimes the embolus is very small and is dissolved by the blood’s fibrinolitic system before permanent brain damage occurs. In such cases, symptoms of a stroke are only temporary and there is no permanent brain damage. This is called Transient Ischemic Attack. I believe that you had such an attack.

You may want to consult a neurologist and vascular surgeon about your condition.