Hi Keith
sorry you are feeling so unwell, When I was first diagnosed i was already a type 11 diabetic but very well controlled only two small tablets a day as soon as dex kicked in it was insulin for me as it shot the sugars though the roof coming of of dex and a sugar high feels like the worst thing going but the insulin did help control it a bit, because i take a small dose of steriod now for my kidneys i have stayed on the insulin i manage ok just a small dose am and one pm it seems ok you just have to remember to take a sugary snack out with you incase you go a bit low so you may feel better with the insulin not the tablets once you are off the steriods completly things may settle down again and you could be back to normal
Hope you feel better soon
love Jo x