I actually dont eat any LC foods, only because I dont have access to them, but I know that they can cause problems like you are describing.

Truthfully, even if you at the whole thing, it would only have been a terrible night in the "water closet"!

Your ok, consider why you did it, and move on.
Maybe you have to up your carbs if your craving more. Your weight is already closing on goal, with it only 15 lbs to go, so perhaps moving onto OWL which will up your carbs and give you more room for play. 30 carbs is hardly high, and you probably never even left ketosis.

Good Luck in finding the best course for you.