H.W.
I am not sure why you would give a child extra vaccines at any point. They don't ever have to catch up. You are asking for a disaster. I have several friends that have made the same mistake, for the record you do NOT have to vaccinate in GA and your Doctor is an idiot for doing this.
It most likely is vaccine damage. You need to get your child to an Osteopath and a Homeopath who can help get the toxins out of your child and help to heal your child naturally. Furthermore, you need to be concerned with the issues your child is experiencing that they can't tell you about. I have personally experienced vaccine damage and wouldn't wish it on anyone.
You might want to go to www.yahoogroups.com Join the group called Vaccinations there are a lot of mom's there with vaccine damaged kids that can help you out. You can also ask any questions you might have like, why you don't "catch a child up on their vaccines"
I would also never go back to that doctor.