Young and Pregnant

So I found out yesterday, that my niece is 5 weeks pregnant.  I would be totally happy for her if she wasn't 19,  if she didn't just have a baby in October, and if she had her drivers licenses.  I know I am so judgmental.  This is family I am talking about.  It drives me crazy that at such a young age you have no other dreams than to raise children.  When I was 19, I was thinking of my future, and at that time children were not a part of it.  But now days, kids are raising kids, and it is heart wrenching. .
My nieces baby was born in October, and I have heard she doesn't take very good care of the child.  Which breaks my heart into pieces. I guess one baby is too much for her, why would she be even thinking about having another one?  She doesn't even have a job, and her husband works for 2-5 hours a day at a farm.  Not very financial for this kind of situation.  But who am I to judge.
I was talking to my sister in law, the mother of my niece, she told me that my niece miscarried in the beginning of February.  But she is already 5 weeks pregnant.  Amazing, when I went through my miscarriage I was devastated.  I cried all the time, the last thing I thought about was sex.  I was an emotional wreck, but I guess everyone takes emotional situations in different ways.  It  just amazes me that my niece, had no feelings about  the miscarriage at all, which completely tears out my heart, because I remember how I dealt with the same situation.
I just wish that lessons in life weren't so hard, and people would learn a valuable lesson, without hurting others.  I just sometimes don't understand, one person can take such a touchy topic and not have any feelings about it..  Because I will always remember the child that I lost, because I loved her/him even if I only knew them for a little while.