I would start with reading the posts from toolsd, myself, and fairlane. Will give you a pretty good idea of how bad this test is.

When you took the second test was it also with USDTL? If you read my other posts you will see why you really should be taking another test with Labcorp as the backend. Without a second test to dispute USDTL you are going to have problems. Even with it, you will likely still have problems. Especially if you have anything against you other than these tests. The court is pre-disposed to treat you as a liar. They believe these tests no matter how bad they are.

Toolsd and I have a lot of data showing the tests are questionable. I wish we had more same day tests with conflicting results. We have conflicts same day at USDTL different testing facilities and same day conflicts with USDTL and Labcorp and other sources. But I will warn you unless you have a lot of cash to fight good luck getting a court to pay attention to you (at least that was my wife’s experience). You are unfortunately a new member of the USDTL victims club. If you want to PM me an email or phone number I might be able to make some suggestions (especially if your problems are in DFW). I suspect toolsd will reach out as well.