Hi Becca,
When I knock myself out of ketosis I normally go back on the bars the very next day (as far as I'm concerned if I can get into ketosis and keep in ketosis with the bars and flavourings once, then I can again) but everyone is different, I think if it keeps my motivation up and keeps me on the right track, then why not?
I'm sure a CDC will be along shortly and will let you know either way or another.
BTW, well done about getting straight back on it, my mistake was that I used to say 'ooh, I'll have another day off' then feel all fat and depressed!