Absolutely they change over time - sometimes up and sometimes down - hot or cold weather can exacerbate it. However whether it's heat or cold, the body does acclimatise - I always use the red hot fortnights we used to spend on the beach in Southern Crete.
The first few days my needs would reduce a lot and stay very low for a week or so - then the last few days, it would go back up again to normal pre-holiday levels.
So I don't really think it is wholly that, but the weather may have exacerbated it.
However, you can only do what you have been doing BUT!! - it does need mentioning to the Head Honcho you see about this - so if you don't have an appointment soon - get on the phone to his secretary and get one made.
If you have recovered some of your own output it would be great - but the mixed insulin it sounds like you are on at the moment, may not be the ideal bedfellow with your changed body - so it may mean a change of regime. Anyway - it needs discussing with a bloke that knows the ins and outs of it, doesn't it? The devil is usually in the detail of these bodily glitches, whatever they may be.
I take it incidentally you are only classed as Type 2 because of the circumstances of your pancreatic lack of function - that because it wasn't auto-immune it isn't classed as Type 1 - whereas you don't have any of the 'normal' T2 markers eg metabolic syndrome or insulin resistance - because you are on very low doses for a grown man anyway - T2s normally require one heck of a lot more than a T1. I may only take 8-ish units of basal a day - but I still take another c.10 units for the c.100g carbs I eat daily - whereas you are going to be bigger than my 9 stone 5ft 3 package anyway I should imagine? and most likely eat quite a lot more carbs daily? - so if you were T1 I'd expect you to need more - and T2 could easily be 2x or 3x as much.
Just keep testing - frequently! - and adjusting doses accordingly until you can get specific advice.
