Fasting will absolutely NOT help. Elevated catecholamines...stress! Don't do it. Eat. ditch the IF until your sleep schedule is normal. The whole point of IF is to introduce a transient stresor to POSSIBLY enhance performance, health and longevity. We know a Low-ish carb, paleo-esque diet delivers great benefits, even at 4-5 meals per day. Get things dialed back in and then tinker with IF.
"Survival will be neither to the strongest of the species, nor to the most intelligent, but to those most adaptable to change."