Some other options in addition to calling 000...

Crisis support lines 24/7 (Some might not apply, but I didn't want to exclude any in case they do.)

Lifeline 13 11 14

Suicide Call Back Service 1300 659 467

Kids Helpline 1800 55 1800

MensLine Australia 1300 78 99 78

For current and former ADF members and their families
Veterans and Veterans Families Counselling Service 1800 011 046

All-hours Support Line 1800 628 036

Defence Family Helpline 1800 624 608

1800 IM SICK 1800 467 425

Visit Get Help | National Mental Health Commission to access the hyperlinks for the phone numbers and organization information.

You are NOT a burden or any such thing. And not thinking anyone or anything can help anymore is exactly what depression would say. It is lying to you.

Do reach out. Keep reaching out. Take it a minute at the time.