I always think with the problems you see yourself as having, it is best to seek professional help. Most big department stores have Personal Stylists who you can book for a day or half day to restructure your wardrobe and suggest garments that would suit you.
Similarly, with deciding on a suitable exercise or beauty programme. An advice session with a trainer at a gym or sports centre and qualified beautician can give far better advice than we can.
I would be very concerned about any eating regime that enables you to lose a stone in a fortnight -and probably put it back on as fast. There is so much information in the media at present on different weight loss program from 5:2, 16:8, Slimming World, Weight Watchers, to name but a few, that it should be possible for you to identify one best suited to your medical condition that will enable you to lose weight in a slower manner and more sustainably.