I'm taking a cotinine test next monday which would mean i've been nicotine free for 7 days. will i pass?

Yes: Assuming you've been clean. You're doing yourself a huge favor by abstaining from nicotine. Best wishes.

Not necessarily: How much do you use? Regular smoker? “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/