I'm out on bail with conditions and I failed my drug test but my last one was clean. Will they start me?
Will they "start" you? I'm not sure what that means. A typo? Of course, a person on pretrial condition release should comply with all conditions, including no use of non-prescribed drugs and drug testing. I don't have enough info here to go on, but in general avoid all illegal drugs. If you have and the drug test is mistaken, you can ask for a retest at your expense. If you did use illegal drugs in violation, be sure to stop now, so you'll be clean next time. In the meantime, consult with a criminal defense attorney about it, at least by phone.
It depends on a lot of factors charge jurisdiction past history. Contact an attorney