How long until Seroquel leaves your system?

I have a drug test next week for a new job and I take 25mg of Seroquel for sleep disorder. The job is a 24/ 7 on call job. I've been taking Seroquel for three years and have taken 25mg, once before bedtime, for the past year. Recently I cut my 25mg pill in half to wean myself off because I want my natural sleep back without feeling hung over evrytime I wake up. I don't want to be groggy if I get called in the middle of the night to go to work. This drug screen finds everything that is in your system. Should I tell the drug screening physician anyhow that I'm on this stuff or will it show up in that test if I stop taking that 12mg (25 mg cut in half) pill?.