Hello Lozziew, and a warm welcome.
This can be very difficult, especially if they have not had any previous experience before, simply because they don't understand and find it hard to believe that an illness could take control over you.
I had an elderly friend ask me the same question over and over and no matter how many times I printed off material, he couldn't work out why I was depressed, and it was only when he was admitted to a nursing home, he realised
Being in your late 20's is a completely different matter and I'm truly sorry for you to be in this situation.
I want to definitely get back to you, but in the meantime, BBlue has this site to look at, if possible:
-Beyond Blue provides information and support to help everyone in Australia achieve their best possible mental health.
-there are many other links people may provide, it's just that I have to leave.
Great to hear from you.