Diluted UA result....advice needed.

I have a new job at a hospital and have not smoked in over 2-weeks. I did a trial run on the dilution method and did a home test, with a negative result. I was not sure how much Creatine to take, so only took 2-3 per day for 2-days prior to my official test, which was this morning. This morning, I did the dilution method again, took a couple more Creatine and was told that my urine was too diluted to complete the test. They want me to return this afternoon, but with the amount of B2 in my system my urine will be too bright. I can make an excuse and go in tomorrow, but not sure what I can do to not have a diluted result. Any advice is welcomed!