Sugar in urine?

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So I have GD but it's been controlled. I'll randomly have some high numbers but they're usually fine. This morning and my dr appt I did the urine strip, which I always do. And I saw that the sugar color was different so I looked it up and it indicated sugar in my urine. My dr looked at it and just threw it away and dint say anything? So I guess it wasn't enough of a color change for her to care. But should I be worried? I know if she's not, then I shouldn't be but idk what sugar in my urine means? I went home and tested my blood sugar and it was 88. Which is lower than what they want it at after snacks. Is it normal to have some sugar in your urine at the end? I'm 38 weeks. Thanks! I've just never had it and am worried!