Welcome to the forums and thank you for being here. I'm really sorry to hear about your stillbirth.
Paul (blondguy) is absolutely right - grief doesn't have a timeline. Everyone grieves differently, some more intense than others, and that's all okay.
Having said that though, sometimes after a while the intensity of the grief can linger on and interrupt our day to day lives, like lingering in with depression. So it's okay to seek help. Seeking help isn't about 'fixing you' either - just being able to cope with it. Particularly when I'm hearing that you're blaming yourself, and I'm imagining that it must be so exhausting to be constantly feeling like that's your fault. A stillbirth isn't anybody's fault.
With the employment services, it depends on who you ask. In some services they can consider a diagnosis of depression to be a disability, where as others have much more specific requirements. Good employment services provider will always take into account your needs and wants (diagnosis or not) so it pays to persist.
One place you might want to check out is SANDS - they have both helplines, live chats and email support - all from people who have been in similar situations. Their site is here - https://www.sands.org.au/ and if you want to give them a ring you can reach them on 1300 072 637.
Hope this helps,