Having read more of you responses my view is you would be safer to go to rehab or be supervised at least for detox. A doctor can help you work out whats best. I know this is very hard but can you go to your parents and let them support you to get some treatment. If all comes to all the emergency department is there too. I know it is all money but you can sort that out once you are sober for a while.
Please do not lose hope....you can recover from this.