3+ Glucose urinalysis but doctor says it's nothing? Should I get a second opinion?

I'm 28 and relatively healthy. I won't go into detail, but I've had a couple health issues pop up in the last year and decided to get a physical with my PCP and full bloodwork to be more proactive.

My test results came back with multiple abnormalities, including 3+ Glucose in my urine test. I know that any glucose in urine is not good. I asked my doctor, and he said all was well despite all the apparent abnormalities. Maybe just eat healthier.

Am I being paranoid or is this too lax? I've already had a kidney stone in the past and want to avoid any future issues if I can get ahead of it. Should I go to a different doctor or keep pestering this doc? Let me know.