5 years ago I was diagnosed with epilepsy after 1 seizure (in a stressful situation) with an EEG test (+normal MRI results).could it be wrong/sth else?

My response. First, epilepsy means more than one seizure, and you had a solitary event. Second, the diagnosis was probably correct, and your EEG likely showed abnormal findings c/w a risk for further events. But if you have been stable for 5 yrs, seems worthwhile to repeat EEG, if you are on medicines and see if you could taper off. Discuss with local neurologist.