Hey there, what part of Australia are you from? I'm from the Wicked West!
About the Dex, don't cut them off completely, lower them by one a day, if you can. I, too, suffer from depression and I stopped taking the Dex abruptly and it was awful. Stop lowering at one or two a day, maybe go a day without any here and there, no longer, until you get used to it.
Please believe me on this, I've done it.