Did this really happen to me?

How do I know if I even want another baby? I just had one ! 
We are finally sleeping through the night.. No more bottles longer naps 
I literally just signed up for collage courses.. I feel like crying..
I got the IUD for a reason because I am in a long term relationship and I want a future for myself and my family 
How do I find out if I want another ??
Much less afford one?..