No, you don't have to go back completely 14 days. Usually a 3-4 days of a clean induction (or where you left off for those who are past Induction and are reading this), and you're body will have used up the "extra" stuff you've added in.
However, it's very crucial that you move into the thinking that you are worthy of making the changes in your eating positive, keep exercising, drinking your water, and remembering that when dealing with emotional or habititual eating...we all fall, but it's how we get up and move along that makes the difference. You have to keep going don't let the habits or emotions rule over your food choices
Cheers!