It's good that you have recognised the fact you are slipping, but you clearly need to address the issues with food, to prevent a relapse - not being negative just honest.
If you have found the time to run then you should also be able to find the time to eat - the two need to go together if you intend to keep well! I think you said you had been given a meal plan so why not implement that and make sure you stick to it, even if you want to exchange some white foods for wholemeal style foods? For snacks nuts and raisins/dates are good and not to heavy afterwards - or do you have a list of 'safe' foods that you can eat more of? Look at the times of your meals and when you run so that the excuse of feeling full before running cannot be used!
I do hope Tuesday goes ok - is there any other sort of help you can have? With regard to Scott Jurek's book - look at it from the positive point of view that he eats really healthy foods; runs superbly and is not at all fat!!! you have to accept the fact that in order to run you also have to eat - sorry I know it's sounding harsh but I also know it's true.....running has helped me to see food as fuel - still a long way to go but I do have a slightly better acceptance that I need to eat to run.
Good luck and take care (rest as well!). 
