High blood sugar?

Nicole • 2 👼🏼👼🏼, 🌈 on the way 1-6-20

After I ate lunch ( 6 inch subway, chips & a ginger ale pop) I took my blood sugar & it was 174.. I’ve never had my blood sugar this high. I’ve called my midwife to tell her my sugars have been really high the past week. Does it sound like I have gestational diabetes? Does anyone else have this? I’m 34 weeks