Do you think my son should be tested for absence seizures?

My 2 year old has these moments that I only see when he is in therapy where he spaces out for a few seconds. But sometimes I know he's listening to something like a plane going overhead, is distracted or simply having sensory overload because they really push him to learn. Most of what I've read says that onset is 4 years and that there are other things normally going along with it. All of his metabolic and genetic testing is normal. Is there really a serious cause for me to put him through an EKG??? Why do we have to torture these poor kids? I read that most kids grow out of them anyway and some kids don't respond to drugs. Gosh - I don't want to put him on epilepsy drugs - I've heard those can mess a person up more than the seizures. What do you think? I'd really like to hear from someone who has had a young child with this or a doctor who has seen it.