Talk to General Physician on Lethargy, Sleep Issues

I am feeling super lethargic. For past few weeks i was unable to sleep like at all. I was taking barely an hour or two sleep in a day, but from last two days i am way too lethargic and sleepy, i am feeling so low, there are chills and weird smells that only i can smell. when i wake up my head feels so heavy as i have tons of weight. I have lost my appetite too. Its not like that i dont feel hunger. Hunger pangs arae hotay hain i just dont feel like eating anything. I need help how can i make this all better. Is there any kind of diet that i can follow.