Everyone gets depressed when someone close to them dies or commits suicide, that is completely normal. Any doctor will tell you to be depressed for a few weeks at a time, at such a time, is actually to be expected. However, depression lasting longer than a few weeks or recurring constantly, is something to be worried about.
If you do not feel that the psychiatrist you saw listened to you, it is never out of the question to seek a second opionion. If money is a problem for you, there are public assistance programs and church programs that offer free or sliding scale programs to those that could not other wise afford them.
I hope you have family and friends that are close by or close to you, that you can talk to. It is important that you keep a line of communication open with the most important people in your life. I speak from experience, I am bi-polar and have had a diagnosis for about 8 years. Even though it is difficult for someone without a mental disorder to understand how you are feeling, if you have a family like mine, they will love you all the same!
Good luck in your endevers! Remember that no matter what is "wrong" with you, you are no less or no better than anyone else, and you are special in the eyes of god! Be good to yourself.
Good luck
mia