four months isn't that much time. put it in perspective.
do what you can right now, maybe get some coconut oil and take it straight from the spoon in the morning. this will add fat, then maybe fast a day or two. little things like that to chip away at the negatives.
but you won't die if you ride this out for four months then go full primal when you are away from the meal plan.
your objective right now is to blunt the corrosive effects of the meal plan diet. you're in management mode right now. go raw balls when it's your time.