In the meanwhile, I'd try to keep as much as possible to low GI carbs as your body should digest them more slowly, and to mix them as much as possible with fat, protein, and veg, rather than eating carbs on their own, as that will also slow them down more.
Different foods will effect different people differently, of course, so you'll need to test to be sure as some of these will be more suitable for you than others, but low GI carbs include: porridge, new potatoes, brown rice, sweet potatoes, whole milk, yogurt, soya/linseed bread such as burgen bread, heavily seeded/mixed grain bread, chocolate, oatcakes, beans & lentils, carrots, apples, and pears. Mix them with nuts, cheese, butter, green veg, meat, and fish as much as possible. You could also try a tub of ice cream (medium GI but mostly fat rather than carbs) and see how you get on with that, and even try a small cake that's very fat-based, like a chocolate brownie (I hardly need any insulin for those - for comparison I need twice as much for flapjacks and three times as much for scones).
Avoid high GI foods like white bread, most cereals, white rice, mashed potatoes, chips, scones, and donuts, and also avoid anything likely to spike blood sugar, which includes fruit juice and fruit drinks, dried fruits, bananas, grapes, exotic fruits, jam, and honey.
Hopefully that will help for a bit to keep the balance between losing any more weight and spiking your blood sugar too much, but I think you do, as Mike says, need to be on rapid acting insulin as well as the slow acting one, so I really hope your pancreatic team will be able to help.