This is not normal. Sometimes people feel a bit tired or have a little headache, but chills, foggy head, and exhaustion to the point you can't function is not something that normally happens on whole30.
Is it possible you've picked up some kind of illness? That seems the most likely thing to explain these symptoms.
Food-wise, make sure you're eating enough (1-2 palm-sized portions of protein, 1-2 thumb-sized portions of fat or half to a whole avocado or a large handful of olives or other fats listed on the template, and lots of vegetables -- including at least one serving of starchy vegetables each day for most people). Be sure you salt your food and drink plenty of water.