How is it possible?

How is it physically possible to not sleep.  I can be exhausted and weak and still not sleep until maybe 4:30 in the morning.  Last night not at all.  I marvel at the idea.  If I was a prisoner of war and my captors tried to torture me with sleep deprivation the joke would be on them.  I would laugh inside of myself and watch them squirm trying to figure out how I could stay awake night after night.  I don't know how it's possible and it's me. One night I loaded up on everything in my homeopathic arsenal of sleep aids and still remained awake.  I started early in the evening trying to prepare myself for some form of relaxed restfulness.  Not to be.   I remember seeing an episode of Star Trek the Next Generation when the crew was suffering from sleep deprivation and were having all kinds of hallucinations.  I haven't been entertained with this bizarre side effect.  I just have swirling thoughts that swim around when I'm trying to figure out what to do with my mind when my body won't sleep. I just ordered a couple of other homeopathic remedies that might help.  Have to keep trying.  I just laid in bed this morning as the light started to come into the room and wondered if this was really my life.  I forced myself to get up.  Now I just drift.  I'm too tired to be of much good to anyone.  Here I go to do the best I can to hold and try to do a little something here or there, then rest, then maybe a little something else.   I wonder what information my captors are trying to get out of me...