Hi Ella,
I hope you enjoy the time with your nephew.
If you have cravings, know that they don't usually last long and that you can get through them. Do something that will take your mind off things for a few minutes.
And, you're right to try to compromise about ther 1000 calorie a day diet. Maybe you could try to give up some of the junk food and eat healthier meals instead and don't worry too much about the calorie intake.