Right now i feel so depress, i am crying, what can i do.

Relax: Try to relax and take a deep breath, try to speak to someone if possible , chang the atmosphere around you ..

Your Dr can assess: for mood disorder & causative underlying medical conditions. Talking therapy (Cognitive Behavioral Therapy or insight oriented psychotherapy) is allows for lasting change. Psychiatric meds may be indicated. Don't isolate. Spend time w people. Use your support system. Get out. Get at least 8 hrs of sleep/ night & eat healthfully. Daily aerobic physical activity is a big +. Try acupuncture, tai chi