Anxiety symptoms include sleeplessness. Anxious people often worry in bed, preventing them from falling asleep. Mental hyperarousal from worrying causes insomnia, says scientists. OCD, PSTD, and GAD sufferers have sleep problems. Anxiety impairs REM sleep, according to a study. Anxiety causes unsettling nightmares and nighttime awakenings, say online lorazepam buyers. These dreams create a fear...