I was accused of diverting narcotics and I agreed to a drug screen because I knew I wasn't diverting. After I took the drug test, I was suspended. So on my way home, I picked up a 7-panel & a 14-panel drug test from the drug store. The tests I took came back negative across the board for all substances. The drug screen for work was negative for opioids, but it was positive for amphetamine. When I got the call obviously I was shocked, but the lady on the phone kept asking what prescription medications I take and I only told her about my PRESCRIBED medications, I didn't know she wanted to know OTCs or herbals as well. She made a sound like she didn't believe me and said the test is positive for amphetamine. I tell her there's no way and she gives the phone to someone else and he tells me he's reporting a positive test unless I can bring a physical prescription to him. I told him I don't have a prescription and I think it's a false positive. He tells me I can have the other vial sent off to be tested but I have to pay $347 right then. Which I do not have. Obviously, I've been on the internet reading about other medications that can cause a false positive and found out Sudafed and Mucinex can cause it. Which I've been taking both religiously since the weather changed in September. I'm terrified. Can someone give me some guidance?