I know how you feel sometimes...the worse thing even for me is trying to fall asleep when I have a twinging of an upset stomach (i.e. general indigestion) and forget it...I'll wake up out of a sleep in a panic and even have the chills...its so weird.

I hate that too when you get that random thought just stuck in your head and it won't go away. That also triggers me sometimes too...maybe a good suggestion for you is for you to fall asleep to the TV on or something or drink a hot tea before bed hoping it would relax you??

Good luck.