well first off i would stop seeing your health visitor!
'vacant and with no warmth to her gaze'??? really???? what a fucking idiot (scuse my language)
can i ask, did she suggest anything? or did she just tell you this, worry you half to death and then leave you to deal with it?
yes, thought so
she is a tiny baby. they do things at different times. if she has smiled in the past then I can almost guarantee you that she will smile again, and that those smiles will become more and more frequent.
she probably doesn't hold eye contact because she is so busy looking at everything else around her. the entire world is new and exciting to a little baby.
forget the books, your baby hasn't read them and doesn't know what she is "supposed" to be doing. they're fine as a rough guide, but not all babies will do things at the "right" age, and if you're becoming worried about her then I think it would do you the world of good to stop reading htem.
I know it's a cliche and it's easy for me to say, but just enjoy her!
you know what, there is a small possibility that she may turn out to be autistic. there is a small possibility of anyone's baby turning out to be autistic, but based on your post I would not say that she is any more likely than any other baby to have autism. It's certainly not something that can be picked up as early as 8 weeks.
and even if she does turn out to have autism, or anything else for that matter then you won't care, because she is still your lovely little girl... isn't she? she is who she is
one last thing, have you spoken to a GP about how you're feeling? if you're feeling excessively anxious or upset and if it's spoiling this time for you then it might be worth exploring the possibility of PND, or some kind of anxiety issue?