every night i stay up to 4 or 5 am. i keep my computer on sometimes to get sleepy but that doesnt work too well and even when i turn my computer and tv off, i find myself tossing and turning or i start thinking about all the bad things in my life. if i finally do go to sleep, i have really bad nightmares such as me committing suicide, getting killed or about to get killed. i wake up through the night with my heartbeat racing and im sweating. i really dont know what to do