soccer,
I would suggests talking with the people you come in contact with the most. Ask them if they ever see you 'disconnect.' My teachers would complain that I was daydreaming.
If others around you know what to watch for, they may be a big help. My wife says I get a stern grimace on my face. Other times, she says I look spacey or disconnected, like I am staring right through things.
I used to become aware of losing focus on my surroundings. I would find myself looking at things that I had no reason to look at, i.e. baby food at the grocery store, my kids are all grown.
The normal EEG will be just a shot in the dark unless you can get help in understanding any triggers. A QEEG/brain map by a specialist who understands the technology could help point in the right direction.
Check out
http://www.childrenshospital.org/az/...geS1509P0.html