Drug test used crack cocaine 8 days ago. My weight is 166 and im 5'8". I also exercise and do sauna sessions. Will I test positive after 8 days.?

Technically, no but. ...The only way to know for sure is to take a home drug test (about 20 dollars at your local drug store). The bigger concern is that your ability to maintain a job will be slim considering this significant addiction. Seek professional help and attend aa/na meetings asap.