Will this help get rid of continine from my system in 3 days?

Will WHAT help? Cotinine is generally gone in 3 days, no matter what you do. It does not help to try to "flush" the body, because most tests are able to detect that you are doing that, and it will automatically fail you on that test. What you NEED to do is quit smoking, both for your health and for whatever reason (job related, I assume) you are being drug tested. If you have 3 days, STOP NOW.