Spoilers maybe
.
.
.
.
.
.
.
.
.
.
.
Aelia is right, it takes only 1 sleep cycle (8 hours) to get Jaheira back. 24 hours was needed after you cured her from the curse. In this particular case however, rest for 8 hours or just travel to some outdoors area (if you're in the city) or back to city (if you're in outdoors area) and she will be back with you.
PS: all this colorful text is pain in the place where back-ends-and-legs-start to read, the 'common' color will do just fine..
__________________
|