la ilaha illallah muhammad rasool allah
remeber to recite the last three suras from the quran three times before you sleep. also there are remeberence of Allah that you can say before sleep, you can most likely find them online, if you can't let me know and I will type them up and send them to you in an E-mail.
I hope this video can help inshallah : )http://www.youtube.com/watch?v=hwg9pUSk5GgAlso, nightmares only come from shaitaan. If you can, try and wake up from it and then recite Quran and go back to sleep. :)
jazakAllah kheir to the both of you for the suggestions