Your sleeping problem is probably due to depression
and not the other way round. Depression is a common problem and is expected to be the most imporatnt cause of burden of disease by 2020 (World Health Organization).
I am not sure if you consulted a specialist or a general physician. The medicine (a combination of anti depressant
and anti anxiety
) have no doubt heped you, but they are not to be stopped after 15 days. Treatment for depression is usually long term to prevent relapse of symptoms (as in your case). Consult a psychiatrist
and discuss regarding the duration of treatment.