worried 15 month old is showing signs of autism

[gillianh2222]

hi, so last week i noticed a few things in my son that wasn't so "normal" a few things i've picked up on are.
dose not respond to name.
rarely makes eye contact.
dose not talk just "hms" did babble but stopped around 10 months.
if he sits down and feels something behind his head (wall for example) will bang his head a few times.
constantly shuts doors.
won't play with myself or other children at play group.
doesn't point for something.
dose not ask for help just cries if he can't do something.
no pretend play unless i put the phone to his ear for him then he will listen and again "hmm".
won't engage in play with myself.
won't bring me things when i ask him to, has no idea what i'm asking for.
spins around on his bum in circles.
shakes his head from side to side (ears have been checked)
doesn't point for things.
obsessed with cars more the wheels.
we have an appointment next week to see a doctor and start getting a referral in place to see someone but since noticing this all i'v done nothing but cry i don't know where i've gone wrong.
he's a very happy little man not much upsets him accept when i say "ta" when i ask him for something he has hold of that he wants.
i've been made aware that seeing a professional can take ALOT of time so in the meantime if this dose sound like autism is there any advice anyone could give me with helping him with the above problems i can try at home. i want to start asap really as read the sooner you start helping there is a very small chance that they can outgrow it or at least make it easier for adult hood.
i'm sorry if this is mumbled and not much sense my brain feels like scrambled egg at the moment.
thank you for any giving advice on it.

You mention an older child? Did she have problems with speech and communication? I'm guessing not? So don't let any Dr tell you it's your parenting because I bet you parent your Ds that way because you sound like a great parent who's in tune with their child.

The fact files polter linked to are really helpful.

thank you 2boysnamedR i've just ordered little daft things to hopefully get started next week :)
in the morning he is amazing with connecting with me and engaging with play after his nap is when he's not interested would just rather play with his cars i also was meaning to ask if him pushing cars back and forth classed as "normal" play? he's not massively obsessed with the wheels with his cars but he is with the ones on his wooden trike :/ and also whether him using a spoon at dinner time even if it has nothing on it but he puts it in his mouth ok? he's always mainly just dug in head first with his food so fingers everywhere :)

No youarentkiddingme her speech was none stop from the start and still like that 10yrs on but 10yrs ago i didn't have a TV
someone who dose the local play groups came out and had a chat with me and just basically said to carry on encouraging play groups as it could help him socially amazingly even if he dose not play or look at other children he may do one day and have the chance to play so going to keep at that and hopefully have a break through with his speech somehow :)

finally got round to reading all the fact files last night, was a lot of useful information on there and a lot that will help me help him with his speech. thank you :)