Depression and taking medicine for years

I found this board several months ago but I joined just yesterday. I always felt I have nothing valuable to say. Anyway, now I feel the need to join. Events that have happened recently moved me to reach out either for support and to try to be helpful to other people.
I suffer from depression and taking medicine for years. I have experienced ups and downs, sometimes better sometimes worse times. You know it. In October I had to be hospitalized in psychiatric hospital. It was my third time to be there. The reason was that I tried to commit suicide. Weeks before that I felt totally desperate. My condition got worse and worse. I experienced big disappointments with some people who are close to me and I think that was the trigger for depression attack. I could barely sleep abut I always felt tired. I couldn't even cry, And I saw I getting on my wife's nerves. I just came to conclusion that it would be better if I stop all that. Luckily, in the hospital they saved my life (I was 2 days in coma). After ER, I was sent to psychiatric hospital. I stayed there for 5 weeks. I know I almost died then and now, even I still have problems with my mood and lack of energy, I want to reach for help and for support.
My depression is coming from my childhood. As a child, I was abused by my father and bullied in school. Maybe later I can tell more about it, I don't want to write it now. All those things marked me for life. I was 19, when I was able to leave home and I thought all bad is left behind, but it is not that easy. True, I know how to communicate now, I can find friends already but I still carry it with me wherever I go. The fears I have are reflected everywhere, when I talk to others, even when I doing as simple things as shopping. Many times memories come back to me, even as the nightmares, many times I have woke up with screaming.
There are many I would like to say, maybe by time I will be able.
Another reason I joined this forum is that I would like to be in some way helpful to others. We all have problems and I would like to be supportive to others because I know what does it mean to suffer. I hope i can contribute.