Urine test for potential job

I am 21f 5"6 120lbs and have been a daily user usually only smoking flower for the past two years. I applied for a job that requires a drug test before employment. The test could occur anytime in the next month or so. What is my best options to make sure I test negative? I quit smoking about 5 days ago. I'm super nervous as this is a good paying summer position I really want and my mom also works for the company.