Insomnia but Not Apnea

A month ago I had a sleep study to see if the cause of my insomnia was apnea.  Luckily it isn't.  I have alot of problems with sleep.  I usually can't fall asleep very easily but if I am exhausted enough, sometimes I can fall asleep.  If I am lucky enough to fall asleep, I usually only sleep for a few hours and then I wake up in the middle of the night.  At that point, it's too late to take my prescription sleep aide but early enough where I need more sleep.  Then there are nights that even after I take my prescription sleep aide, I can't sleep. 
Soooo, I went to a sleep/insomnia specialist.  She seemed like she wasn't sure what was wrong with me.  She said that although my symptoms didn't point towards sleep apnea, she still wanted me to do the sleep study.  I was really nervous about the sleep study but I went anyway.  I was told by a psychologist one time that when I get nervous or anxious, its best to move than to stay still, so I moved around as much as I could.  Being nervous, anxious or scared is because your flight or fight response is over firing.  The amygdala is over sensitive.  The best way to calm down is to move because it calms down the amygdala.
Anyway, when I saw the specialist for a follow-up, she said thatthe test didn't really give her more answers.  She said the only thing she can really do is give me a different medication for sleep aide.  I have since tried the new one and it seems to be helping me more, thank God!