According to the duration of alcohol use and the symptoms you describe after you've stopped drinking, you are probably experiencing abstinence syndrome. Abstinence syndrome is one of the main characteristics of alcohol abuse and dependency. Tremors are due to nerve and pain damage and is very typical for alcohol abuse.
Treatment of alcohol dependency is a complicated matter and can be done only in specialized institutions for treating dependencies under the supervision of psychiatrists and mental health professional specialized in treating alcohol abuse. The most important thing is to stop drinking alcohol. You can also seek help from a 12-step recovery support group.