Stop ingesting fructose in all of its forms, including fruit. Stop ingesting wheat and related grains. Build your diet around meat and fat, heavy on fat.
You won’t do any of these things, otherwise you wouldn’t be in this predicament. It was nice knowing you.
I want to echo what nagant wrote: stop eating fructose in all its forms.
Actually, anything containing any form of -ose. Those are all sugars. That means fruit or milk.
Consume meat and fat. Fat is good for you and is needed by the body. Avoiding lactose does not include heavy cream, butter or cheeses.
I disagree with nagant’s last paragraph. You can make this change.