@gingermillie, I highly recommend Lisa from CYH at Edwardstown. She helped me with DD when she wasn't sleeping well. She's lovely, has 2 kids of her own and isn't one if the nazi MCHNs you often get.
I think there are two Lisa's, so ask for the one with curly blonde hair.
I think Torrens House will be amazing for you both. They have paediatricians who can rule out physical problems before you start.
I like you had the 'normal' baby, who did 'normal' things and I was definitely not a just run with it, it will get better on it's own. Yes I know babies all sleep through when they're ready and at different ages, but I couldn't just keep doing what I was doing and not try and change something.
The fact you are seeking help doesn't make you a bad mother for not coping, or wanting to change things, or not being willing to accept your baby is 'normal' and do nothing until it passes. You're seeking help as you know there is *something* that will help your DD sleep better, yes it is likely something you can do differently, but that's not a reflection on you as a parent, all it says is that you haven't quite been able to pinpoint those 1 or 2 or 3 key things that will work for *your* bub that you're also comfortable with. Let's call it your 'magic potion'.
Finding the right combination of those key things what ever they may be (solids, less feeds, different settling techniques, a structured schedule.... Whatever... Your magic potion) can be like finding a needle in a haystack and that's what BH and CYH nurses and Torrens House are there for.... Empowering you to make the right changes for your bub and for you.
You've done such a great job with her sleep issues for this long, I commend you and wish you all the best for finding your magic potion.