He is still very young so I would try hard not to worry.
On the other hand you may get some help and reassurance if you contact the National Autistic Society or ask for some of their literature. Try:
www.autism.org.uk/#
They are usually very helpful.
As I said, he is very young. One of my DGSs was a very late talker and he used to line toys up very meticulously! I did research at the Institute of Psychiatry on Autism and had a very disabled Autistic cousin with other complications. My daughter and I, though not alarmed, were watching her little chap, who was quite an individual. However, said DGS is moving forward well now and appears to be making normal progress, albeit having a rather distinctive personality quite different from his brothers and cousins. It is very difficult to know whether behaviour indicates an enduring condition such as Autism when they are still as young as 20 months, but times have changed, and some Psychiatrists say one can make a diagnosis quite early, which helps with the child's future as behaviour modification games can start, such as making eye-contact. But I do understand your worries and how one cannot help looking at a child and wondering if something needs help when they are not speaking yet. Maybe learning a bit more about it might help, but do be careful not to see what you are looking for! It is so easy to do that, and all children play autistic-like games at times, especially when they are still under 2 years old. I agree that you have noticed several signs one would expect him to respond to which he does not, such as his name. There is no harm in asking for a reference for a specialist assessment. I hope that in time you will see him opening up, especially when he makes contact with more children as he gets older. If he is autistic then the future is not to be feared. So much more is understood now, and the children have a good education. I have to say, I really love autistic people! Imho they are very special.
What do you think would go well with coasters like this?
NEVER EVER HAVE I - Game 2 (Alphabetical)
To go through chemo therapy or choose not to?