pegasus is completely right here....Aspergers/autism spectrum has absolutely nothing to do with bad parenting! What it may do is when you and he receive the proper dx and assistance is to learn new parenting skills that will HELP him learn how to adjust.
Remember that this is a learning experience for the both of you hon. We as parents are not taught how to deal with these things and have to learn how best to cope with and teach our kids when they have an illness. Please do NOT put this on your shoulders as having any fault in your sons illness....there is no blame to be placed on YOU.
Take some deep breathes Ingridave......nice and slow...don't let yourself get caught up in the round and round thinking of whys/hows/I did something wrongs. You are doing exactly the right thing in having your son tested. From there, if indeed he has Aspergers, you will be able to work and get the specialized help that you BOTH need

It will be a win/win situation for you and him and your family.
Wishing you well hon......remember to breathe

sabby