Welcome back, it has been I think 3 years since I remember reading your story . Your schooldays sounded horrible, but you dealt with them despite the most difficult of circumstances, being bullied. A real feat of strength.
As you say you changed a bit then, and now, over 20 years later are still suffering the effects, on top of unemployment. You still seem to have sleeping problems, or did the come back more recently?
Psychiatrists are expensive and it is not surprising you cannot afford one, however a GP can prescribe, and perhaps continue on with your medication, or find some other way, maybe a MH plan, to allow you to get the treatment you need?
Do you think you can find a bulk-billing doctor that might help?
In relation to therapy, perhaps the free organisation (government backed) called the Mindspot Clinic may be able to help. The have therapeutic courses for anxiety, depression and other conditions, report back to your GP and use qualified staff
Not an ideal situation to be on-line, but can be quite effective and you do have the option to talk with a clinician during the course.
Dental treatment is hard to come by, and outpatients at a hospital are the only way I know, however I've no real idea. I would suggest you ring our 24/7 Help line on 1300 22 4636 and ask if they know of any such facilities operating in your area, you never know.
You mentioned games and guitar playing to fill the time, do you still do these?
I'm sorry to hear your family and freinds are not being sportive. Feeling isolated is horrible and just make thngs worse. Is there no one who might care but has remained silent?
You know you are always welcome here