You should also get actual insulin levels tested, if you can. This should be drawn during a period
of hypoglycemia (
low blood sugar). If insulin is detectable, the indication is insulin resistance, which means your body is producing insulin, but using it. Talk to your doctor about this.
Insulin resistance is generally, but not always associated with weight gain, even though type I diabetes is associated with weight loss. You don't have to have diabetes in the family to have it.