Pre-pregnancy I had a history of high insulin levels in random blood tests as well as symptoms that corrolated to excess
carb intake (dizziness, "foggy" brain, shaking, blacking out when going too long without food, etc), but when I was referred by my PCP to an endocrinologist he laughed and said there was no way someone with my body type was hypoglycemic (which he said was a myth aside from pre-diabetes), and so I must be imagining the symptoms.
Fast-forward to pregnancy.