Discovering Nocturnal Seizures: Seeking Answers

So, discovered that I've probably been having nocturnal seizures for an unknown period of time. I recently got married and my husband said, "you do this thing in your sleep" followed by imitating electrocution. Since I've slept alone since my sister and I got our own room way back in elementary school, who knows when it started. I was completely unaware. My neurologist couldn't get enough data to diagnose after a brain MRI and outpatient EEG, so, was referred to an epileptic specialist. Now I'm on day 3 of a multi-day EEG. Two nights down and no seizure yet. (Although my husband said they were happening most nights and multiple time just before dawn.) Of course, it's hard to sleep with lights in a different place. How long does it usually take to diagnose this definitively? What else can they do if it doesn't happen while I'm here? Thanks!!