Memory recall, biological rhythms, and melatonin

One of the common symptoms of elderly males is nocturia-the desire for frequent urination during the sleep period. Sleep is also the period during which the body produces the neurohormone melatonin.
Among its many  functions, Melatonin plays a significant role in jet lag and biological rhythms.
I notice that after I have awaken , urinated and returned to my bed, I have difficulty  falling asleep. It seems that the cause  is related to my mind becoming very alert and rapidly reflecting periods of my past experiences. What I find especially amazing is my ability to recall the names of  various individuals that are visible  in these movie sequences- these would be names that during my regular waking hours I would have difficulty in recalling. The videos are very vivid. I certainly am fully conscious because I frequently voluntarily look at the clock to see the time. I must confess that I have often been tempted to get out my pencil and paper to record these thoughts- now of course its my  iPad or iPhone
Could there be a correlation with melatonin ,wake periods of deep thoughts, memory enhancement,  with the body releasing this hormone ?  The obvious way to begin answering this question(s) is to perform some of the obvious basic brain research- beginning with melatonin concentration, EEGs, MRI. etc. to determine what the brain "is thinking" during the thought process and during the period of darkness?Does that statement make sense ? I also wonder if there is some way to record these video clips on uTube as ideas for potential future research projects (even in my late years).
Melatonin is often prescribed for insomnia. Maybe it  might also be useful for Alzheimer patients who have difficulty remembering names,  and for those students  cramming for those dreaded exams as well as for  individuals preparing and delivering speeches without relying on those popular props ?
 Melatonin could possibly also give those  individuals competing in spelling and other competitions relying on memory recall an advantage  just like those enhancing drugs in sports enduring competitions which  some might be tempted to  label the  Lance Armstrong effect .