I'm exhausted but can't sleep. for the past 8 days i've only slept 3-4 hours per night, only 1-1.5 hours at a time. i'm so tired i can't keep my eyes open. i tried relaxation and meds. but i'm still wide awake just laying there with my eyes closed.

Doctor can evaluate: Normal, healthy people don't get constant tiredness or sleep problems without a good reason. One's primary care doctor can evaluate and look for symptom causes such as anemia, infection, mental illness like depression, auto-immune disease, thyroid problem, cancer, sleep disorder, etc... Various tests may be needed, depending on one's whole story, and her sequence of symptoms.