Hi Beachy - not the best news anyone can have mate, sorry about that but 'welcome to the Club no-one wanted to join!'
Can I say that when a diabetic has any illness from the common cold to, well, cancer - then our blood glucose does shoot right up because the body needs extra glucose to fight the infection, and it can't get at it because insulin is the sort-of key to letting the glucose (from the food we eat) into the right places where it's needed, and our insulin producing/using mechanism isn't functioning properly - so the body chucks it out, firstly into the bloodstream and then via the kidneys into our pee, to get rid of what it can't use.
At the same time we may crave sweet stuff.
I've seen a post from another chap on another forum today who had a heart attack followed by a mini-stroke, and was diagnosed Type 2 at the same time. He went straight onto insulin to get him over the hump but a few months later he's completely off insulin and just taking a couple of tablets a day, watching his diet and going to the gym!
With BG that high consistently I would have thought you really ought to be getting some treatment for it (I mean what do I know, no medical qualifications) but I shouldn't think you can take any more exercise than the other bloke could at the time so you can't get rid of it the exercise way.
Ring the hospital in the morning and tell em what you've told us. I think it needs sorting soon mate.