Feeling warm rules out arsenicum. Arsenicum loves heat, hot tops, sitting right next to the fire or stove will blankets on, etc.. This is not arsenicum.
I will be able to give you some more likely possibilities in a moment.
Tell me more about the sleep problem. More detail is helpful, anything unusual.
Any physical things about you, any chronic symptoms, for example with skin, muscles, teeth, ....anything?
Anything else about environment, weather, season, place, foods, etc?