Am I crazy for wanting this...?

I had a termination afew months ago. It was medically advised and the best thing for my family. It was also the biggest mistake I've ever made. I feel horrible and will never forgive myself. Since then all I've wanted is to become pregnant again. I was hoping with all my heart that the procedure failed but I know it didn't and now all I can think about is having another baby. My fiance doesn't understand why I feel like I need to have another baby. I feel like if I could fall pregnant again then maybe, just maybe, it might help to ease my guilt. I know it won't bring back the baby I terminated but a part of me thinks that if I can fall pregnant again as soon as possible it would be like I never went through with the termination and I can forget it ever happened.

Am I crazy for feeling like this?