Hey mate, I'm not sure if anyone has ever told you this, but Wellbutrin can cause seizures, especially in people who drink a LOT and then cease drinking straight away. The valium would've helped to reduce the likelihood of you having any seizures the day after your hospital visit but seriously man, you've gotta be careful!!! Honestly, I'm surprised you haven't had a seizure with the amount you've been drinking. I guess it's because you've been drinking every day and haven't really stopped.
The valium would be out of your system by now, and because you've had a few beers yesterday and today you're likely not really experiencing much in the way of withdrawals right now. And hopefully because you've essentially tapered down your alcohol use over the last few days, if you don't have anything to drink tomorrow or the next day or for however many days/weeks/months after that, you probably won't have bad physical withdrawals.
It's great you're going to the AA meetings, so
definitely keep that up! Because you're an overseas traveller and don't have any insurance, if you go to a doctor or a rehab centre it's going to cost you the full amount (obviously), but there are a few other options for you to consider:
Wesley Mission counselling, they have places in the city and in Ashfield (about 15 mins from the city on the train).
There is also
SMART Recovery which is a good online recovery service.
This page also has an extensive list of places you might like to call. It doesn't specify if they're free/low-cost services but it's worth a try:
http://www.adin.com.au/content.asp?Document_ID=38#nsw
And if you google "online alcohol counselling" there are heaps of online counselling services you could try.
Good luck, and please try to keep in mind that risk of seizures with Wellbutrin! I'm on Wellbutrin as well and whenever I want to binge-drink it's always in the back of my mind, that I could have a seizure the next day. Scary thought.