Hello.
I agree with you doctors not to attempt surgery.
Lack of sleep could also worsen your metabolic status.
I suggest you to practise an aerobic physical activity (walking, cycling or swimming are the best) for at least 30 min' a day/4 times a week: you should buy a fit-watch to check your
heart rate during exercise to understand if your activity is aerobic or not.
Try to follow a mediterrean diet.
Your most importan meal should be breakfast: eat cereals, yogurt, fibres, and fruit (both fresh and nuts/walnuts/almonds/anacardi).
Have a small break at half morning (for example with a fruit or a yogurt).
Start the lunch with a portion of raw vegetables (Salad, tomatoes, carrots, fennel, cabbage): it will slow the absorpion of the rest of the food and cause satiety. Prefer having integral carbohydrates (pasta, rice, quinoa, millet, spelled) with vegetables (zucchini, eggplant, cauliflower,...) at lunch.
Have a small breakfast at half afternoon with yogurt or fruit.
Start the dinner with a portion of raw vegetables (Salad, tomatoes, carrots, fennel, cabbage): it will slow the absorpion of the rest of the food and cause satiety. Then have a balanced meal: include cereals, protein (egg, white meat such as chicken or turkey, legumes).
Don't finish the dinner with fresh fruit, it will cause you a spike in your
glycemia.
If you are hungry in late night, have a hot beverage, and eat some nuts/walnuts/almonds/anacardi.