See a doctor. If you don't have a doctor, virtually any general practioner in the phone book will be able to guide you, and these GP visits are generally inexpensive should you not be insured.
Each body differs. Some can drink a liter of whiskey a day for years and quit with only moderate symptoms. Some are young such as yourself but can suffer severe DTs. Just see a doctor, tell him or her your exact habits, and listen to the advice. You may simply be prescribed a mild sedative. You might be recommended for full medical supervision. I was able to do mine at home via sedatives despite about 5 straight years of liter-per-day scotch and bourbon. However, everyone is different, and that's why you need to see a physician!
Make no mistake...the people here who may seem 'alarmist' about the dangers of detox are not kidding. You may have slowed down recently, but alcohol DTs actually kill people...so make at least one doctor visit and listen to their pro opinion.