Michelle, that's an excellent achievement and you should be very proud.

I heard somewhere not so long ago that people who lose large amounts of weight may not experience the mental boost they expected to. They reckon this is because ultimately you're still you, you still look more or less like you (minus the 28kg), and you've still got all the same hangups and lack of confidence that you had when you had the extra weight - so basically you're expecting to wake up one day and not only have a new body but also a new mind. The new mind or outlook needs to be developed separately.

As you said, you haven't really got the ability at the moment to be going on a shopping spree, but do try and pick up one or two nice new clothing items (it can be quick and can be nice without being pricey) to reflect the new you. All your habits, clothes and routines are still the same, but your body isn't, so it may just take a few things like this to make you realise that at 28kg lighter, you are a different person.

Whatever you do, don't get disillusioned now and give up. Keep going.