3am tests

That would be a good place to start, you would need to just test it out and see.........theoretically you should be able to go steady overnight, and by steady that means, up and down within 1-2mmol/l, that margin of tolerance is acceptable.

once you have got the your bg holding within the 1-2mmol then you can be confident that dose is right, then you can go on to test the morning BI dose, by carb free tests throughout the day..........its usually OK to do 3 days testing but stagger the times you go carb free, so Monday breakfast carb free, Tuesday lunch carb free, Wednesday dinner carb free, this will tell you what your morning BI is doing at those 3 critical times of the day.

You may find that the breakfast, lunch and dinner periods all require different levels of BI, but unfortunately without a pump you can never accommodate that, but when injecting insulin there is rarely ever real need to get the BI that accurate, and surplus or deficit BI needs can be caught with your QA insulin.......

Book and appointment and see what your DSN says, they will be more equipped than me to advise you.......

Sounds like a starting place, thank you so so much for your help!