Hi DeafJet - welcome to BL and good on you for being self-aware enough to look for help. I dunno, it took many years for me to get over meth abuse, in many ways I never have fully recovered. Unfortunately I wasn't as self aware as you so instead of trying to maintain my life and look for ways of dealing what I was going through I just withdrew from it all together. As such I don't have much to offer you. Generally, seeing a psychologist would be a good start - you can get a subsidised mental health plan if you go to see a GP. They'll ask you a bunch of questions, IIRC they tend to relate to depression and anxiety so you might need to massage the results a bit to get the referral you need. Once you've got it, try to find a psychologist who does mindfulness. Because your mental health issues are part of a withdrawal process I'm unsure as to how helpful it will be but generally speaking it seems to be the gold standard for coping with troubling emotions.
Also, go check out the Dark Side subforum on Bluelight, you'll get a broader response there from people all over the place (rather than just Australians) and many of the regulars there will have been through very similar drug withdrawals and are very passionate about supporting fellow Bluelighters, whereas this forum is more focused on general drug info. Not saying there won't be great advice from here but jsut that there will be more of it over there.
http://www.bluelight.org/vb/forums/268-Recovery-Support
Best of luck.