I would ask the physician, for what it's worth, for a full blood panel, CBC, BMP, TSH with T3, T4, Iron panel , lipid, folate etc the works then pay particular attention to evaluating thyroid function and liver function.....sounds crazy but after spending 8 months on 4 1/2 - 5 hours of sleep a Concierge Dr ordered these labs. We are currently looking at the thyroid and ferritin levels in relationship to insomnia.....just a suggestion. You need someone who can be invested in the quality and amount of sleep you get, Unfortunately there are not many who will be! Functional Medicine...worth a try