what to do

What to do, when you are lost?

What to do, when you are feeling lonely?
Where to run?
Which path to choose?
What to do?
I probably don't know, I have no one. I am just another person in the world, living alone under a bridge. I am nothing, near the whole world. My acts won't change anything. My choices won't afect anyone.
I haven't always been like this, you know, pessimist. When I was a child, I used to think everything was gonna be all right, everybody would be ok. But I was wrong. When I was, I think 12, my mom started to feel sick. And then, suddenly, without warning, without fanfare, without preparation, she had a baby, and died, leaving the baby to my care. My little brother. He was so small, and I did not know how to handle him. My father had left long ago, and I doubted my bother's father would come back to us.
So I left my brother at the door of a house where there lived a childless couple, I waited until morning, they opened the door, saw my brother, and adopted him. I was happy in that moment, but only a few hours later, I was crying my heart out. Once, I had everything, a mother, a brother, a father. Even if I didn't have a house, or went to school, I was happy. Truly happy. But now, there was I. Alone in the world with only 12 years. I grew up thinking I was alone, thinking I was going to die. Everytime I went to sleep, the same nightmares plagued me. Night after night.
Some years later, when I was 17, I found a guy, he was wonderfull to me. Even thought I was a homeless girl, he loved me. We stayed together, and I got pregnant. But then, the unpredictable. There was him, there was a car. The car was running, he was crossing the street. The car hit him. In a moment, he was alive, in the other, he wasn't. I was completely broken. All I wanted, was to die. But and the baby inside of me? He needed someone. He needed to live. I decided to do my best to take care of him.
And, well, here I am, alone, weak, thin, starving, tired, ill, pregnant and homeless... But I know, that someday, I'll be happy again.
I just don't know what to do.