oh, sorry, it works for me (just re-tried)
I was the one pushing for investigations with my dd. I went to the baby clinic every month or so from when she was about 7 months old, as there was soemthing not quite right about her.
the hvs at that point were useless - they would look at her, ask whether she was eating and sleeping (yes, on both counts, in spades!) and then tell me she was lovely (well, yes, i knew that )
she was not at all interested in the world around her. at 12 months old, she still was not really reaching out and picking up toys (was able to, but just didn't) - if you gave her a toy, she would hold it and look at it in a politely interested kind of way, but not play with it. I could gve her a ball to hold, and put her on her playmat, then go and hang the washing out, have a cup of tea, walk the dog (disclaimer: i didn't really do this bit) and she would be where I'd put her when i got back.
when she was 14 months old, i was back at the clinic talking to another hv. we spoke for about 40 mins, d1 played with a brick (one single brick) for the whole time - just picking it up and dropping it again, then giggling and doing it again. I was told at this point i was lucky to have such an easy baby (she was not babling, and did not point/bring me stuff either - her method of "playing" was not my only concern)
Thankfully, when dd1 was 17 months, we moved, and at 19 months I went to the hv again, praying that she would listen to me.
She did, did the CHAT test (dd1 failed on all critical points, i think, but baffled them on the social side) and dd got referred to SALT and Paed, and we went from there (mind you, it still was a painful process - the first paed we saw said there was no way dd1 could be autisitic because she wasn't rocking in a corner ).
dd1 was diagnosed at about 2.9 or so, by which point it was no surprise to me. Sadly, because i took the news so calmly, I think I have been labelled as indenial. you've got to laugh, really.
Well done (sorry that sounds patronising) on picking up on things so early. Knowing (if there is something to be known) is the best thing you can do, as at least you are working forma position of strength.