You're going to be all right and bounce back from this. Just get through one day and you will feel motivated to get back to your original plan.
Everybody falls off the wagon at some time, whether it is eating more than or not doing their daily exercise. Instead of beating yourself up about it, put it behind you and don't give it a second thought. You have already lost 30 pounds, so I know you have the drive and dedication to continue losing.
If you start feeling that urge to eat, take a walk. Or read, or work a puzzle...anything to get your mind off food.
I would say good luck, but I won't because you don't need it. You're going to be just fine