Can Gabapentin, Lasix Or Seroquel Show False Positive For Benzo?

I take gabapentin,lacex,saraquill and magnesium. and my u.a.'s keep coming back dity for benzo's. can you think of why this ishappenin g to me? im not using any benzo's. it's beendamn near 4mos. and nobody is taking the time to figure this out. now they want me to pay $25. to send it to lab for Toxicity I shouldn't have to come out of pocket for something that has been ongoing!