@James1968 - As I understand it, you were prescribed a mixed insulin, so a bit of long and a bit of short acting mixed together?
On that basis, and bearing in mind you were prescribed it liuterally just before Christmas, I imagine the prescriber would be a bit cautios with the amounts suggested as starters. That maybe coupled with holiday eating (different foods, and maybe a different sort of mix of foods) has meant the guestimate is a bit off.
I'm guessing the dosing will get better with time, although it could take a while.
I'm an imaginer when it comes to understanding things. Yes, I read all the papers, but then build an image in my head of what it all means.
In it's most simple of forms, for me, T2s not taking insulin (or other hypoglycaemia inducing drugs), when we eat a carbohydrate, it's like pushing the accelorator in ther car. It boosts the blood sugars (as a the car analogy would boost the car speed). When we stop eating, the speed (blood sugars) goes up, and is maintained by momentun, until, over time,the speed drops back again, until we do the same.
For T2s, taking insulin the same thing happens with the accelorator, but then the injected insulin applies the brakes, to reduce the speed (bring the blood sugars down).
Many would say that sprt of driving is going to lead to a bumpy ride (and I'd likely join them in that), until the proportions are right.
Today, you're not in the best place to mess around with insulin dises, but what you could moderate would be the fuel you are eating.
I know I have read elsewhere that you didn't. for whatever reason, get along with the rediuced carb diets, but if you were able to do that to moderate those numbers a bit, it's likely you could begin to feel better. Then you could work with your nurse to better match your food and insulin to the levels you feel more comfortable with.
I know that is waaaaaaaaaaaaaaaaaaaay over-simplied, but it's the way I would probably look at things in your shoes.
You didn't arrive at your very uncomfortable state overnight, so it's probably a bit unrealistic to think it'd all be better quickly either.
Just my thoughts.