Doris,
Dropping leaves when re-potting is not unusual..
As long as you don't overwater, it's unlikely you killed it..
Did you just cut real small roots ?? of some of the bigger ones ?? if bigger ones, then you should have left the plant out of the pot for a couple of days while the cuts healed... if you didn't, and it was repotted more than a day or so ago, i'd just not water it for a week or 10 days, until new leaves start to come out, then water lightly...
if you want to unpot, then treat the cuts with cinnamon and let it dry out for a couple of days before you repot.. If it was a very big root, then let it dry out for a week at least before you repot.
