It can be difficult to get used to changes in diet, but with a little willpower and perseverance it can be done! I used to eat biscuits, crisps and cakes a lot of the time, but now I find that I hardly touch them 🙂 It's good that you're getting help with all this - you might even find there are some things you thought you'd hate but find you like!
You must have been feeling rotten to have levels that were so high all the time, so don't worry if you have been feeling down - it's only natural. Do you know when you will be leaving hospital? Do you have anyone at home to help you and keep an eye on you when you leave? Do keep us updated - don't leave it so long this time! 🙂