Narcolepsy and terrible nightmares?

I have now got to the stage where I am actually frightened to fall asleep and I try my absolute best to fight sleep (which as all narcoleptics know is an extremely hard thing to do), I am scared to fall asleep due to the terrible realistic nightmares that I have more-or-less every time that I fall asleep.......... I wake up sweating..... I also talk in my sleep and sometimes have heated arguments with people in my nightmares - sometimes the talking/arguing etc wakes me up, sometimes it doesn't???? The nightmares are extremely frightening and I often dream very similar dreams over and over again!!!!! How many of us have these terrible nightmares and does anyone have any tips to stop or at least help with these terrible dreams....................