struggling so early

I cannot seem to wake up.  I've been trying to get my eyes open and feel like I can get something accomplished since about 6am and it is just before 10 am now.  I keep falling asleep.  Even if I don't lay down I fall asleep sitting up.  don't know why but I'm not liking it.  I have a bunch of stuff I need to done today but I cannot get started like this.  This happens sometimes, it is actually the cause of me loosing my job.  I would fall asleep at my post.  Terrible to feel this way but I had a sleep study already and they don't know the cause.  It is frustrating that I cannot get my sleep patterns under control.  Okay, I've bitched enouth