Pregnant too soon

So I am 21 and in school. I gave birth to my daughter four months ago. My family was quite upset that I was even pregnant mainly because I was in school and had very little money. I have not even had my period yet but noticed I was super tired and extreme back pain. I also had this pain with my first pregnancy. I decided just to take a pregnancy test and of course I am pregnant. This is very unexpected for me and I'm just trying to figure out what to do. What would you do? I am thinking a million different things but just so emotional and don't know if what I want to do is the "right" thing.