The first step in getting the right treatment is to recognize that you're depressed. The next is to seek help. These things may be the hardest part of the entire process, but once you connect with a doctor, there are many ways to help you get better.
Antidepressant drugs may be an option, but you'll need to use them only as your doctor prescribes. They usually work best when you take them along with psychotherapy, or talk therapy. In this kind of treatment, you talk to a mental health care professional, who can help you work through the things that may trigger your depression.