Am I taking enough creatine to make a difference?
That would depend on what your "baseline" creatinine level was before loading and diluting - and youre not going to know this without testing yourself with a validity test kit.

When utilizing dilution techniques, its advisable to have some validity test strips at hand so you can keep tabs on your creatinine levels (as well as the urine Specific Gravity). These kits are inexpensive and are found online by doing a Google search for "drug adulteration test kits".