looking for advice on abortion

I'm about 7 weeks pregnant. I just graduated college and started a new job, was not trying for a child but somehow it happened anyway. This is my second pregnancy. I had an abortion 6 months ago because I was still in school at that point and did not feel ready to have a child. I still don't feel ready.  I want to focus on my new job at this point in my life, I'm living on my own for the first time ever and I love it. I don't know if I want to bring a baby into my life to care for. Some days I really feel that I want to keep the baby because pregnancy is exciting and having a baby is exciting (I'm a labor & delivery nurse so that probably contributes to those feelings) and then other days I feel completely overwhelmed with the thought of becoming a mother and having a child to care for for the rest of my life and feel that abortion is my only option. Some days I want an abortion and other days I don't. I'm torn as I don't know what to do with these conflicting feelings. Any advice?