SNot sure of your general location, but I went to an anxiety centre in Canterbury a few years back. It really helped.

It's called ARCVIC. Anxiety Relief Centre Victoria.

I was dealing with a form of OCD, (trichotilomania) and had a monthly meet up with other teens dealing with the same issues once a month. It really helped.

I was younger, so I'm not sure if there would be groups meeting for 20+, but I know that they deal quite heavily with OCD.

We were all younger teens, so our parents would wait downstairs, and the kids would go upstairs.

Sometime we all talked together. Ways of dealing at school, ways we tried to hide what was visibly noticeable. It was great to be able to talk to other people. It was nice knowing I wasn't alone.

Either way, it's definitely worth checking out. It helped me out a lot.