Hi Tracy, welcome to the forum
🙂 Very sorry to hear that you are feeling so low
We have a number of members here who also have complex health problems and problems with mobility, so you are not alone, and hopefully they will be able to help by sharing their own experiences and ways of dealing with things
🙂 Whatever you can manage exercise-wise is helpful - have you spoken to your GP or nurse about possibly finding some suitable exercises that you can manage? I've no personal experience of metformin, but have heard it can act as an appetite suppressant. If you're not up to eating much, it's important that you make sure what you are eating is giving you the right amount of essential nutrients and vitamins.
Perhaps there are other things we can suggest that you would find helpful? Do you test your blood sugar levels so that you can monitor the effect of your food choices on them and discover the things you tolerate well and what you ought to avoid? There may be some very simple changes you can make without realising that could lead to improved levels. People have very individual tolerances to things - whatever the 'official' advice is, there really is no 'one-size-fits-all' when it comes to diabetes! Perhaps if you described a typical day's diet we could make some suggestions?
If your levels are higher than normal this can contribute to your feelings of low mood and general lethargy, so getting good control should help ease things.
Please let us knoow if you have any questions, we will be more than happy to help, and understand the kinds of problems you are facing because many of us (if not all) have felt the same at one time or another. Let's try and change that 'tired' in your User Name to 'buzzing'!
🙂