I think i am going through depression and would need medical assistance and this has on going for nearly 7 years and i dont know where to begin. how do i get a referral letter to get admitted ?

Primary care doctor: There are many signs that may suggest depression, such as: feelings of sadness or hopelessness, angry outbursts or irritability, loss of interest in normal activities, sleep disturbances, tiredness or a lack of energy, either weight gain or weight loss due to appetite changes, anxiety or restlessness, slowed thinking, feeling worthless, etc... Seeing one's primary care doctor is a good start.

Therapy?: Ruling out all physical causes, have you yet tried any form of psychotherapy? Typically, the optimal combination of things to treat emotional issues such as anxiety or depression is medication (which, on your best day, is supposed to take the edge off symptoms) but the real gruntwork takes place in psychotherapist's consulting room.