OMGosh! Been there with the kidney stones! The doc is just being thorough in checking you out. All of the things you are exhibiting come with aging and living in a house. If you had a chance to be outside a lot you would make your own vitamin D, but you might get skin cancer, too!
Take a buddy or a tape recorder to the food class. They throw more at you in three hours than any normal person can absorb. Then, after that, come here with your individual food questions and someone here will help you thru it. It's kind of like a big puzzle, putting all the nutrients, fats, carbs and proteins together in the right way. After a while it becomes sort of second nature to eat the right stuff. I've actually taken the food class twice and it changed in the ten years between classes. So I know they are learning more about
diabetes and foods every day.
I wish that we had more nutrition education in schools. (I also wish it would rain quarters, but I don't see that happening soon, either.) It's sad that we don't really pay attention to this stuff until it threatens our health. But Grandma was right... eat your vegetables! (LOL!)