It is excellent that you follow a healthy lifestyle with exercising!! You must continue with that, but i would suggest that you see a biokineticist to ensure that your exercise program and what you are eating is balanced - weight gain/loss will depend on your energy input and energy expenditure - as this may be different from one person to another. If there is weight gain you must either decrease the portion sizes or increase your energy output, by exercising more or participating in more daily activities.
Insulin resistance may play a role in your health-related problems but it can be managed. Another important aspect is the effect of your emotions on your health - you may benefit from psychological support as you mentioned that you are miserable and unhappy.
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