I stopped using nicotine pouches 9 days ago and have a saliva screening tomorrow. have been hydrating and exercising more than my usual. will i likely test negative?

Maybe/not: The time needed for 1/2 the nicotine to leave your system is up to 40 hours (half life). Most consider 4 half lives to be needed to remove most traces of a drug from your body. However, nicotine does bind to fat cells in your body & this may cause small amounts to remain. The sensitivity of the test will determine what they pick up. Consider explaining your efforts to quit to the people involved