I'm not posting this anonymously; you can PM me anytime.
I'm sorry to hear how you're feeling. I was diagnosed with schizophrenia right after my GCSEs, and it screwed up the next 5 years of my life to no end. Come to think of it, I really don't remember even doing GCSEs, just having not one, but two guys talking to me constantly, seeing moving 'shadows', hearing deep breathing behind me all the time etc.
I know pills suck, I feel the same. I had to spend a year in a psychiatric facility, calling doctors and nurses all the names under the sun because I thought they were trying to kill me. I 'escaped' twice too! I even thought my Mum was poisoning me, and wouldn't let her talk to me. I spent the better part of a year talking to a man who the doctors had trapped in a wall in my room, and that was basically my only company. (Feel free to laugh, I don't mind!)
But hey, enough of the past, I got through it and so will you. I'm restarting my life now, have a place at University and have a future to look forward to.
I was on disability benefits too for five years. It made me feel like a scrounging piece of dirt. But I wasn't. You've taken the best step of all in realising that you are sick and have already gotten help. My anti-depressants and anti-psychotics didn't work for a long time. I was switching pills every month or so. Go to your psychiatrist and tell him exactly how the pills are or aren't working. He or she WILL help you. Don't dwell on the fact that one particular pill does nothing at all for you.
Another step to take is to realise that this guy talking to you is NOT TELLING THE TRUTH. He is not expressing your ideas, he is doing the opposite. It may take years for him to leave (I still hear voices), so you must learn to deal with it. Rationalise it, tell him he's not real, tell him to go ****** himself and get some power over him.
As someone who has gotten through this know that it is possible to have a future. Unfortunately you just have to work for it much harder than anyone else. I remember one night deciding that I would lie in bed and just let myself waste away, but a couple of years later I had a job, and am now in education again. There is a future out there; you can have one too! You just have to believe in yourself, let people help you (never resist) and tell that man you hear to piss off and learn to ignore him.
Now please contact your doctor and explain everything to them. They will understand, don't be scared!