What's my next move

With what you are saying you had an inconclusive false negative. It doesn't mean they found something that made you fail it, it means there are outside factors that made your urine sample invalid to prove you passed it. A CDL lawyer can easily get that thrown out of your record.

As for everything on here... If you ask a question, ignore everything until you get the answer you need. You will always have dozens of lectures, people telling you how you screwed up, information that is not relevant, and occasionally, someone will get off the road, read your question, and try to point you in the right direction. If you open up a thread, please give it time for others to respond. Lashing out against members that don't give you the info you want/need only makes things worse since people will think you are too stuck up to accept criticism. Trust me, I've opened up dozens of threads and received a crapload of flak from many people. In one ear, out the other. Just like real life.