My dr prescribed anti-depressant drugs to me for 30 days but i left them after 3 weeks because i feel no improving but he told me before to comeback !

Antidepressants: All antidepressants require at least 4-6 weeks for effectiveness. Effect can even increase from there. It sounds like you expected results before this and stopped your medication before they could deliver them. Psychotherapy is also a very important part of recovery from depression. I hope you'll consider restarting the medicine you have stopped, and discuss this with your doctor.

Well, here's the : Deal - most antidepressants take 4 to 6 weeks to start having a real impact (once your are on the optimum dose). Side effects often start right away but patience is required for you to start showing clinical change. I'd get back on them. Be frank with the doctor/ psychiatrist. It will provider him/her with the opportunity to teach you more about the medication.