@Kentoldlady1
If you are still loosing on your current eating plan and want to stop losing, all you can do is increase your calories, and they have to come from carbs, protein and/or fats. I really struggled to stop so I had to go back to basics of a detailed food diary, weighing food and calorie counting as well as carb counting. I had no intention of increasing carbs and in fact I reduced them to help with blood sugars, so all my extra calories came from protein and fat. It was all trial and error - a bit more cheese, a few more eggs, a bit more butter and so forth, gradually increasing things and carefully counting everything. It was not easy. I must have got it right in the end because I stopped losing, gained a few pounds deliberately, and have maintained ever since.
As for taking an insulin test, it will do no harm. Another way of getting some idea is an OGTT, which you can do at home.