Being generalized as epilepsy

I was diagnosed with epilepsy at 5 y/o.  In highschool I began the surgery process for epilepsy and had the surgery my senior year.  Today is actually my 25 year anniversary from the sucessful surgery :-)  

A couple weeks ago I was doing a colon cleanse from a vitamin shop, I was 'trying to be healthy'.  It was a two week process.  After the fist week I got to work and had a seizure.  Went to the ER and they listened to the symptoms, gave me Keppra and told me  to follow up with my Neurologist.  They didn't bother running any blood work, question me on my habits or things I have been doing.  My nurse friends suggest that I had been dehydrated and had an electrlyte imbalance, which could bring on a seizure for anyone. I obviously stopped the colon cleanse, and not have anymore symptoms.  The week after this event I went out of the country and was sleep deprived, time change adjustments, and no seizure activity occured.  I feel like that just because I have a history people just jump to that conclusion and don't want to look at anything else.  Is this typical?  These were the things I was hoping to avoid with having the surgery.

Thanks for any input.