I had terrible low blood sugar issues for years. I used to panic if I had to work past my usual lunch hour as I'd get irritable, break out in cold sweat & be incapable of concentrating. It was awful. There were times when I'd stuff myself with any carb in sight - bread, chocolate or biscuits etc - until I felt the red mist ease up.
When I fell P it eased up, no idea why. My GTT tests were normal & nurse told me low blood sugar is not connected to diabetes. I did wonder if it was PCOS, but never had any medical help for it so no diagnosis. It seems to have fully gone now thanks to avoiding white bread & white carbs (potatoes, white sugar etc) I will have them once in a while, but they are gone from my everyday diet. I use a bit of Splenda for my coffee and only eat Burgen bread which is low GI.
However he really needs to take charge here. I never expected anyone to manage my LBS but me. DP can tell when it's coming on & knows that I have to have food, fast - but he knows I will say I need it & deal with it. Though thankfully it seems to be sorted now!