Hi JeepMom,
I look at a diagnosis as a "working hypothesis." Those of us with older kids know that none of this stuff is carved in stone. I've had more than one psychiatrist tell me, "if you put a kid in a room with a hundred psychiatrists, you'd likely end up with a hundred different diagnoses."

So much for confidence in THAT profession!
Aspergers is a psychiatric diagnosis. Going to a neurologist won't change the psych dx unless there are neurological symptoms & findings that account for the observed behavior better than the Aspergers dx does. Certainly if your son has anything resembling any sort of seizure, has had head trauma, or birth injury, a neuro workup might be advised.
The most impt thing about getting a dx is that it paves the way for services & resources ... all those things you are asking questions about. Without a dx, special educational considerations aren't likely to happen.
About the parenting, take a deep breath. Your son is the same kid as he was before someone muttered this dx mumbojumbo. You are probably doing a great job right now of feeding, clothing, and loving him. Just keep on doing that, until you figure out the next step. Don't stress out ... relax, you're in this for the long haul.
There's been a lot written the last 10 yrs. on Aspergers. Try your public library for a book or two. Also, ck. around to see if there's an Asperger parent support group in your community.
Best wishes.