First of all, HIV is no longer a sure Death Sentence, if you don't like what you do, which I understand. Accountancy is now is so boring to me.
Why don't you turn a negative into a positive, I hate to say it, but because of your HIV status, but also your Uni education you might get into the Social Workplace. This is a huge area, and in most cases you might go home with some job satisfaction. As you are currently working as a bean counter in a hospital, why don't you take the opportunity to get on the NHS website to find out what is available out there.
Would you like to teach? If you really want to change, you are still so young with a lot of life left in you. I know its hard to look to the future, but for your health sake you have to.
You need to be doing something that gives you satisfaction within your working enviroment. Please research what is available, don't be put off if it takes a year�s training. Being skint is not nice, but is also a learning curve and you will come out the other side. (Also you can get a part-time minimum wage to assist your studies). Please don�t give up � Get Positive about your live not just your HIV status.
Good luck and keep me posted.