Worried about gestational diabetes

I had a small amount of sugar in my urine the other day at the doctor. She said not to worry about it that it was probably from my lunch but she didn’t realize my lunch was a solid 3-4 hours before I even peed in the cup and I had nothing but water in between there. Now I’m starting to feel like I’m getting a yeast infection and worried about g.d. Developing because I’m only 19 weeks and already high risk. Any advice or tips? I don’t do the sugar test until 26-28 weeks.