HI I have secere facial pain and I took one of my mom's oxycontin 60 mg on Sunday the 24th. I won't be tested till the 3rd late in the day which gives me 9 days. I weigh 200 lbs and am 6'1. I've been drinking alot of water and am urinating constantly. Will I be ok. how long does it take to leave your system. I bought a test kit to test for it and am foing to use it tomorrow which is 7 days since i took it. I have a flush should I use it or am I just being paranoid. Any help would be appreciated Thank You