Stressed!

I had my first baby not to long after I turned 18, and now I just turned 19 and I'm pregnant again. I'm stressed about having my babies so close together, and how to provide a bright future with only my high school diploma. My partner and I have also been fighting a lot, and I don't have a lot of outside support. What can I do to relax a bit? I don't want to compromise the health of my baby!