Welcome to the board, vicam! I'm a mom of 8 years old Gifted/Asperger's boy, so I understand what you've been going through emotionally. I'm one of those with the BTDT experience. I did a quite bit of worrying myself- and I still do occasionally even now.
I agree with sittin pretty and renie1. I highly recommend "Misdiagnosis and Dual Diagnosis of Gifted Children". The book helped me understand about my son's issues.
If the school is already suggesting that your son is 2E, can you request a formal evaluation for Asperger's?
You may want to check this site.
http://idea.ed.gov/explore/home
