With your test tomorrow, its too late for you to make the necessary preps in order to pull off a successful dilute. Any creatine-loading must be done at least 3 days prior to the scheduled U/A to allow adequate time for the body to convert the creatine into creatinine.

* I read that for dilution I need to take aspirin (Bayer) and Rolaids. I also read that aspirin and Rolaids can cause false positives for THC. Why do I take them for dilution if they can cause false positives?
Aspirin is outdated tech. Read the closing post in the Dilution "sticky" thread to find out why.

* If I try to over-dilute with tons of water, in hopes of scoring a negative-diluted result on the urine test, is it possible they would call me back the next day for another urine test. If they called me back, I could substitute the second time around, right?
How an employer will handle a "negative/diluted" result depends on the employer. For pre-employment situations, some employers will grant a retest while others would accept the result as a "hunky-dory" , while theres still others that will just simply move on to the next applicant for hire.