Technically everyone is different, the under 20 carbs is really to drop u into keto fast, many people can stay below 80 carbs and be in keto. Just because you got kicked out, it just means you body is fuctioning normally, so your progress may be slowed for the day, but its not the end of the world unless youve been eating carbs all day. Plus the strips r just a guideline, if you drink too much water before u test u can come up out of keto, they are VERY touchy. Just stick to your diet and workouts and dont worry to much about the strips, they are like the scale...can make you crazy, and there are too many factors to give you the whole picture.