How long will weed stay in my system?

I smoked a blunt today for the first time in over a month. When I smoked I did it about 2 or 3 times a week for about 2 months. I quit smoking because I needed to get a job so right after I stopped smoking I started turning in applications. If I get a drug test (urine or mouth swab) to get a job within the next week or two I need to know how many days it will be before my system is clean. Do I need to drink a lot of water and I heard pickle juice works good too? I weigh about 140 and I am 5'10. Any suggestions or tips?