I am a heavy smoker and i have a cotinine test in 11 days. i stopped smoking completely yesterday. is there a chance i will pass?

Possibly: It can take up to 15-20 days to clear your system of cotinine if you are a heavy smoker, would give it 3-4 weeks to be certain

Doubtful: “When someone stops using tobacco & nicotine products, it can take more than 2 weeks for the blood level of cotinine to drop to the level that a non-tobacco user would have & several weeks more for the urine level to decrease to a very low concentration.” REF: http://labtestsonline.org/understanding/analytes/nicotine/tab/test/