You likely had a Seizure
. More details about the event from an eye witness would help decide more conclusively. The MRI
scan will help ascertain whether there are any serious cause for the seizure like a tumour. Many a times it could be normal.
If this is your first episode, medications may be deferred if the MRI & the EEG turns out to be normal. Your treating doctor will help you make that choice.
Hope this helps.