I have to take a drug test.

[Burnt Toast]

I'm not really worried about enough, it's the too much thing that bothers me since anything over 1.0030 tests as a substituted specimen.

This is not correct. Youre also misinterpreting the criteria set for a "substituted" specimen. The creatinine and SG are checked together to determine "substituted".
And under that criteria...

A urine sample is ruled "substituted" (aka "not consistent with human urine") when the creatinine level is less than 2 mg/dL, while the specific gravity is less than, or equal to 1.0010; or greater than 1.0200

Samples with an SG between 1.0030 - 1.0200 are satisfactory.