Have you had an insulin blood test?
Have you had a c-peptide test or GAD?
I ask these questions because, of the way you describe you don't go hypo, if you eat low carb or fast. And you will if take the insulin? Am I right?
I take it, you have a specialist who removed your gallbladder, did you tell him about going hypo?
People go hypo when there is more insulin than necessary in your blood, which is completely different from T1. You probably have insulin resistance and the build up of unused insulin will build something akin to hyperinsulinaemia.
I hope I'm wrong, but this is how my endocrinologist diagnosed me. Going hypo, because of food, and when fasting (for days), I don't go hypo! My problem is I produce too much insulin on my secondary insulin response.
Oh yeah! My motivation is because of my period when I was really ill, and didn't know it, and if I am not careful, it could soon turn into a fatal condition.
No thanks!
I've been in my own hell for so long, and it just doesn't seem to be getting easier. My physical health is great, pity about everything else.
Keep safe