Normal EEG?

Ladies and Gents, A quick question or two, but first I suppose it'd be of some assistance if I posted a bit of background information. A while ago I experienced a seizure for the first time in my adult life - I'm a male in my 30s, excellent shape and general health. My 72 hour history prior to the event included three days of pretty heavy drinking along with hitting my head very hard after a fall three days prior to the seizure occurring. I was taken by ambulance to the hospital. CT scan and MRI came back normal. I received an EEG while I had a pretty noticeable headache which came back with "abnormalities" in the right anterior hemisphere. After those results, the neurologist prescribed me Keppra, which I chose not to take. A week later, a follow up sleep deprived EEG was scheduled. The neurologist told me that my results were significantly improved, but there was still a slight abnormality. He attributed the improvement to the meds before I informed him that I had not taken any of the prescribed Keppra. Now, my question, if there is indeed a slight abnormality, would taking a singly dose of Keppra prior to an EEG make the results more likely to come back as normal with no abnormalities? Its very important for my career that I get a normal EEG as I'm certain that the causes of my sole seizure is likely attributed to alcohol and head trauma. Thank you for any and all assistance.