You might want to wait a couple weeks for the next feeding. In the mean time, you can try a few things to get things "moving" such as a lukewarm shower in the sink for 10 minutes and taking her out to get some exercise.

GTP's are more prone to constipation for some reason, but one thing that seems to help is to keep them active and to make sure their environment is humid. I started misting twice a day instead of just once and it really seemed to help.

Good luck!