I'm so desperate...what shall I do now?

I’m sixteen years old now and I’m pregnant. My boyfriend or my ex-boyfriend left me alone as he heard that. Isn’t that a wonderful life? I didn’t speak to him since his sixteenth birthday, the day when I told him that I’m pregnant. It’s unbelievable. I never thought that of him! I thought the problem would be my parents and not Sam. Sure, it’s not easy for him, but for me either and he has the same fault than me. Now I’ve got two problems my parents and Sam. I don’t know what to do, I’m alone. And the best thing is, yesterday Sam’s mum called me, she seemed to be desperate, I didn’t know why, but then I realized that maybe she rings because of me, especially because of my pregnancy. I couldn’t really believe that he already talked to his mum, but not to me. At this moment I blushed although she only was on the phone, I didn’t know what I should tell her. Already in the next moment she asked me if I know where Sam is. That was a great relieve to me. His mum said that he’s gone since yesterday afternoon, first she thought he’s at my house. As I told her that I didn’t see him for days, she was more desperate. After this conversation I was shocked of him another time. Now, he didn’t just leave me, no, now he also went away from home. Sam, isn’t he a wonderful guy? But the problem is I still love him and I don’t know what will happen with me, Sam and the baby in the future.