I'm no expert (PLEASE let me stress this!), but I think finding a really good neurologist would be the next step. This sounds like a medical issue, and I personally wouldn't be thinking too much about 2E issues. Neurologists should be able to give you feedback on ADHD and Asperger's, as well. I knew a boy growing up who would sometimes zone out, and had some other behavioral issues. He was eventually diagnosed with epilepsy/absence seizures. Seizures can cause drowsiness afterwards. If he's having lots of sleep issues/ daytime sleepiness, you may also want to discuss a sleep study. Best wishes and hope you get some answers soon
