I realize it is now about 2 weeks from when you posted this, and I have no idea whether this will be seen, but here are my thoughts:
This is entirely bad and DANGEROUS advice you have gotten. I have been hired by several former figure competitors to try to rehab their metabolisms from similar advice from old coaches. The reason you can't sleep evem though you are exhausted is that your body is producing cortisol and catecholamines in mass quantities to try to keep you awake and hunting for food (as a survival response).
What I would recommend going forward is to increase your calories gradually--on the order of 100/week for three weeks and then after that 5-6% of your total calorie intake (for example, 60 calories or 1/2 tablespoon of olive oil out of a 1000 calories/day diet).
There are too many factors to go into without knowing your history, but the best general approach is to gradually increase calories while maintaining frequent activity (but cutting down the duration of cardio). A sudden increase in calories will trigger a massive rebound through survival mechanisms, and this will be made worse if you simultaneously drop all your cardio.
I would recommend increasing fats ONLY (except for bcaas or intra workout protein) for the first several weeks. Carb content also tends to trigger massive cravings through leptin signalling pathways. The exception is if you are very low on protein intake--in this case I would increase protein to adequate levels as well.
Carbs should first and foremost come into your workout nutrition when you finally do reintroduce them in quantities outside of fibrous veggies.