Hello, I'm 18 and I have some severe anxiety issues that make it where its really difficult for me to sleep sometimes... my mom sometimes gives me some of her ambien to help me sleep, but since I've been taking it for a while it sometimes takes two pills to help me get some rest... I know that's not good for me, and I know I need to stop. I have been on birth control for the past year and a half but I stopped taking it as soon as I started college. I haven't had a period since the beginning of August. I decided that I needed to see a doctor about my missed periods, but I'm afraid that if I have to have a blood test/urine test taken, they will find out I've been taking a drug that wasn't prescribed for me. I want to get off this medication before I schedule an appointment and get some tests done. How long does ambien stay in your system??