My sleep pattern is as such: able to fall asleep fairly quickly, sleep solid for 3 hrs, then often sleep very lightly after that. why? no apnea.

Depression, Anxiety: Thank you for informing about Depression, Echo and EKG Stress Test. Both Anxiety and Depression can cause sleep problems. Let Wise Man in you reflect: Stresses of • Relationships • Work • Finances • Past unresolved conflicts • Loneliness • Use of Alcohol • Use of Caffeine • Use of Nicotine After that, see a Psychiatrist for • Diagnosis • Counseling for stresses in life • Medication as necessary