How can I overcome bad depression?

Medicine & therapy. Fortunately, there are a variety of effective treatments for depression. The standard treatment includes medication, and/or psychotherapy (cognitive-behavioral therapy). These approaches have been demonstrated to be effective.There are also various brain stimulation therapies (electroconvulsive therapy is the most researched stimulation therapy and has the longest history of use). Ask your doctor.
Treatment, activity. Stay active, get treatment, work closely with your doctor.
Have you been . evaluated for your depression? Are you receiving psychotropic medications. Talking therapy ranks really high. Cognitive Behavioral therapy or psychotherapy can be effective. Aim for daily exercise, 8 hours of sleep per night & good nutrition w 5 servings of veggies & 4 of fruit per day. Try tai chi, yoga, Qi Gong, progressive muscle relaxation, deep breathing exercises & meditation. Don't isolate.