Did I have a stroke?
Anytime a sudden episode such as that occurs, the three things that come to my mind are 1) Stroke, 2) Seizure, 3) Migraine (not the same as a headache). Of those, the most dangerous would be stroke. At a minimum, you should check in with your doctor (soon) for a physical exam and likely some basic tests, including imaging of your brain and arteries, heart tests, and blood samples. A stroke to the artery in the back of your brain (basilar artery) could cause such symptoms. Another possibility was that you suffered a basilar migraine, where inflammation and spasm of the basilar artery would mimic a stroke. A seizure is less likely since you remember the episode, as you would not be expected to have a memory of such a notable seizure.
I hope that helps.
despite that i lost memory of my childhood and found simple things very hard? sorry to be a pain, but it is important to know what i've been through so i can take care in the future.