right just take a minute, and set out a plan. take it day by day. and be strong you can get back on to it, but it does take emmence will power.
get a book and pen, write a diary, do some excercise. get an old pic and stick on fridge...freezer. etc.
plan exactly what you are going to do for the next 3 days. keep busy so you don't have time to eat other foods.
tell your significant other that no matter what you do, that you can only have shakes. if he sees you with anything else in your hand to remind you what you want.
be strong you know you can do it you have done it before.