I can sense your anxiety and it puts me right back to where we were 18 months ago - is he isn't he. Most of us on here have been through that so we know how you are feeling. I know its worrying but the delays in the system are long enough, wait and see is a really bad idea. You are an experienced Mum, you are worried, thats enough reason to seek referral. Try another GP at the Practice to get on this list to see a paediatrician - thats the gateway to a multiteam assessment if there are concerns about autism or see if your local surestart centre does a speech therapy or HV drop in where you can see someone else if you are stuck on a waiting list. Some children can wait 12 months or more for diagnosis. Children are being diagnosed with ASD from 18 months now - lots of GPs don't know this as it used to be much older.
Have you found MCHAT? Its a checklist for ASD - you can find it online - you need to download the instructions of how to score it as well as the checklist - it will also help you understand what the red flags are so you can look for them / test some things out. There are lots of speech difficulties which have nothing to do with ASD. ICAN is another site you might want to look at. Sometimes its only when a child starts talking that you can tell if its ASD or just a speech problem.
Here is some info from teachmetotalk.com. Sorry I know its going to worry you further but early intervention is the key. My nephew loved his speech and play therapy and even though he turned out not to have ASD it stopped him falling behind any further. Intervention has also made a massive difference to my son:
From teachmetotalk.com
"The following guidelines can serve as ?red flags? for parents who are wondering, ?Should I be worried??
· Difficulty making and maintaining eye contact with an adult by 6 months
· No big smiles or other warm, joyful expressions during interaction with another person by 6 months
· No back-and-forth sharing of sounds, smiles, or other facial expressions by 9 months
· No babbling by 12 months
· No back-and-forth gestures, such as pointing, showing, reaching, or waving by 12 months
· No consistent responding to their names by 12 months
· No words by 16 months
· No following simple and familiar directions by 18 months
· No two-word meaningful phrases without imitating or repeating & says at least 50 words by 24 months
· No back-and-forth conversational turn-taking by 30 months
· Any loss of speech or babbling or social skills (like eye contact) at any age
The presence of any of these concerns warrants an immediate discussion with your pediatrician and insistence for a referral to an early intervention program and/or speech-language pathologist for a complete evaluation of your child?s communication skills.
Let me also add that babies who are doing well with social and language development exceed these milestones by leaps and bounds. These are very, very low thresholds for communicative skills. If your child is not meeting these basic guidelines, please don?t dismiss your feelings. Seek professional help from your pediatrician, your local school system, or an early intervention agency"