Does Dill weed effect drug tests?

Two days before a drug test for THC I ate bread-sticks with a Dill weed dipping sauce. I then tested positive for THC. It has been over 2 months since I have smoked (or ingested) marijuana. All tests prior to this were negative. 1 week after the positive test I was back to testing negative for THC. I have racked my brain for anything I may have done differently during this time. The Dill weed dipping sauce was one thing. The only other thing I did different was I did not eat anything the day before my test. However my tether agent says that won't effect the test. So if anyone knows what Dill weed does to your body, please help!!!