Mother of Four,

It definitely is not too late to find out if he has a condition on the Autism Spectrum.  Many people are undiagnosed with Aspergers, which is on the Autism spectrum.  It is great that you are noticing these signs, and you want to help him.  It is never too late to request an evaluation by a school psychologist.  You can get a private evaluation by a school psychologist, or the school psychologist at your local school can also arrange testing.  There will likely be a meeting with you, the school psychologist, a classroom teacher, and other educational professionals you wish to include in the Individualized Education Planning (IEP) team.  

Here is the section on the Education.com website concerning Autism Spectrum Disorder.  You can find more information about testing and diagnosis, behaviors to look for, and more:
http://www.education.com/topic/autism-spectrum-disorders/

I wish the best to you and your son.  It is great that you are actively seeking help to effectively help him.

Best Wishes,

Hayley

You can also talk to your child's doctor about it at his next appointment, or make a special appointment to talk about it. My nephew is autistic, and some of your son's behaviors mimic autism, such as the no eye contact and taking a long time to calm down. my father-in-law even saw some of the behaviors in my 2 year old, and i didn't see them, but she's more apt to be with me more than other adults. your doctor can tell you if he's concerned, and then can tell you where to take him to get him tested. good luck

Everyone that has answered has some great suggestions.  I would also recommend talking to the child's teacher about behavior that is being seen in the classroom.  Sometimes the teacher can get the ball rolling by talking with the counselor and the diagnostician on campus. It would also be helpful to talk with your child's doctor about it also.  Keep being an advocate!