I think that if they wouldn't have medically termintaed it, it would've terminated itself. I know that is a horrible thing to think about, but you have to look at it in a positive way. Something was wrong with your baby and .God didn't want he/she to suffer. It just so happens that you got the scan and the .Drs took care of it before .God could.
As far as trying to conceive again, you should go ahead full force!! Even if something is mentally or physically wrong with it, you should love it. Dealing with the other pregnancy, they said he/she was "severely" misdevoped. If your child comes out with .Cerebral .Palsy, than that's not a problem. It is expensive to care for a mentally/physically disabled child, but it's possible.
I think you should be able to conceive a normal healthy baby, it's all about faith!
Sarah