If your health has been adversely affected over the last 3 years, there is something wrong.
Most likely with either your diet, exercise regime, genetics or lifestyle.
Get specialist advice from a highly experienced medically qualified dietician and a few experienced well recommended nutritionists.
The dietician will be able to provide you with extensive personalised advice in relation to your health issues & dietary needs and some practical support in terms of recommending the most suitable meal plans.
The nutritionists will be able to give you general information about nutritional choices on health & wellbeing, make some suggestions as to changes to consider incorporating into your lifestyle and offer their opinions upon the potential impact of doing so.