hello i'm new to this site. my son who is 3 has recently been diagnosed with autistic spectrum disorder. he has very limited speech uses maybe 20 words so communication with him is very difficult. he has recently started waking at night very distressed. he starts out crying which then goes to whimpering then calm. this can be repeted for several hours. i have no idea what is wrong with him and was just wondering if anyone else has experienced anything similar or has any advice on how to manage this behaviour. all suggestions very much appreciated