@Motherhen2014, Do you have a bg meter? If you do then use it and you may find that there are some vege that you can still eat in moderation also some of the meals that you are used to eating, but you need to repeat test to be sure. It is called eating to your meter. After a short time you get used to what foods you can eat and how much of them. We are all different and take a different approach, the trick is finding what works for you. We can only advise what we have found works for us in our experience. A few general rules are a good start - above ground vege are good, a few berries (6/7) with a portion of full fat Greek style yoghurt makes me a good breakfast that keeps me going until lunchtime, a main meal and a lighter meal, cheese or olives eaten with a cocktail stick for a snack mid evening, 85%+chocolate in the fridge to be eaten a square at a time as a treat.
You say you can not exercise, but a little gentle exercise on a regular basis makes a huge difference to your bg, your outlook on life and you will find that your ankles reappear again. If you can get outside and walk a little would be best, even if it is just to a lamp post and back to start with, but if not then sit on a firm chair and try pulling in your tummy and exercising your upper body, even if you have to use tins of soup as dumbells!
Don't worry about losing 3/4 pounds each week, aim to lose 1/2 and take the weight off gradually. It will drop anyway with fewer carbs and the adjustment to a permanent diet is more gentle. Your body will also thank you for being more gentle and will readjust to your new shape as you go. By the time the summer comes people will be noticing that you are a slimmer, fitter version of yourself and you will be belting and taking in your clothes. It can be done and each day is a fresh start. If you do something you are a winner, so get things ready, get a good sleep tonight and make a start tomorrow.