Pregnant...again!?!

I am 19 years old with an on and off relationship with my child's father...she is currently almost 6 months old and I just found out that I am 8 weeks pregnant. This will make my children 1 year and 1 month apart according to my pregnancy calculator. Since I have had my daughter I made sure I've taken my pill like I was supposed to And haven't missed a day. I have suffered a pretty strong depression with all the stress and events that has recently occurred since my pregnancy and I know another child will probably be the end of me yet I do not believe in abortion and I would never have the strength to give my baby away. I would really like to hear similar stories of success or some advice from people who have been in my situation it would really help me out.