am i ready for another?

I am a 23 year old mother of a beautiful baby boy who will be 2 years old next month. My fiancé has been talking a lot lately about trying to have another baby. At first I was totally against it, I just got into a good job and we are trying to start the process to buy a house and I felt like I wasn't ready to give up and time with baby boy. Then I started thinking about, even dreaming about....every time I see a newborn my heartaches to have that again. Then I think about the pregnancy...the first time went really well but I am afraid it wont go so smooth this time. Any one else having this debate with themselves? If you are please tell me how you are working through making the decision.