poor malystryx! what a state youre in. if its any consolation, I have been in pretty much exactly the same position in the past, being an idle toad and under-achieveing, substance abuse (chas) deep depression/medication and not even a pot to p*ss, couldn't pay me bills, rent, or get any snappin.
unf. they're all interelated
firstly you gotta kick the happy stuff, because thats making the depression bad as it is. Withdrawal is a mental battle unless your on the strong stuff, and even if it is just psycholgical, its desp. hard work esp if you havent got any real support.
second, don't pack in the ant-ds, eventually they will b lock out the worst of the depression but things wont change overnight and the only thing your changing is the Perception of your position, not the actual circumstances. but lets not run before we can walk, eh? do you fell tired all the time and keep falling asleep but dont actually sleep well? have dark dreams about being trapped or crushed and stuff? if so you gotta leave the physical situation youre in. move out and live somewhere else and make sure you have people you trust around you.
third, pretty important this one. the brain-boilers will be eating up yer cash so think of every score as a decent meal gone to waste. Unf many drugs (opiates & stimulants) reduce appetite so in addition to not having any cash, you dont feel hungry meaning you spend more cash on dope. cut the sh*t and you save cash, eat agin and get healthy.
its a hard vicious circle that many fall into and some dont survive. for me it was very hard as I was spending £400 a week on chas and e's then when the money ran out I came back down to Earth with a majorly crash, and suffered severe depression and anxiety for nearly a year, as well as many other things going wrong. oh yeh I was skint too (as in penniless) but and no comfort for you here, it's all self-inflicted, and only you can get yourself out of it. No-one will help you until you're prepared to help yourself.