Doctor I Don't Know Wheather I Am Suffering From Depression

Doctor I don't know wheather I am suffering from depression or not I am not sure it's just I am not able to sleep in nights I am a college student and in final year everyone is expecting from me my parents my girl friend my relatives and I am not able to perform good in my studies and I think I am going to screw everything up after this year.there are some financial problems going on in family and I don't know but from inside I am not happy sometimes I am not able to Handel things and thought of jumping from my balcony.i am getting scared that what will happen in future.please help me doctor.