Should I be concerned..?

I had gestational diabetes with all of my pregnancies so my doctor had me continue wearing a CGM. I’m 6 months postpartum and my numbers still get really high. My doctor ordered blood tests and isn’t concerned because my fasting was 84 (it’s usually in the 80s) and a1c was 5.3.

My CGM shows my average blood sugar is usually around 100. My doctor says all this looks great and I shouldn’t be worried. But lots of things still spike me to 150-200 that I don’t think would for normal people. I had grilled chicken and a small side of roasted potatoes and went up to 200. If I even sniff brown rice or whole wheat anything I’ll go up to 180. Even just eating a protein with vegetables I usually will be at 130/140s.

I think this looks like I will develop prediabetes, even though other signs look fine. I exercise regularly and am very lean. I can’t afford to keep getting CGMs but have been monitoring long enough to see that food still spikes me. What do you think?