not that this will help you, but I found myself waking up several times with visions of a spider coming down from the bedroom ceiling. I know I was wide awake and I swear I saw it. Because I saw it land on our the blanket, I started shaking out the blanket in hopes of getting the spider off the bed. I woke up my husband who then turned on the light and we searched and couldn't find anything. Several weeks later, it happened again. This time when my husband woke up, he asked me if he could see his hand. I said no (as it was pitch dark out) and he said then there would be no way I could see a spider drop from the ceiling (very good point). He told me to go back to sleep and we'd discuss this in the morning.
the next day, we determined that I must have been dreaming that a spider was coming down and must have woken up at the exact time I saw it dropping. So, for me, I knew I saw it, but the reality of it was it was just a dream.
All in all, it happened 3-4 times and each time, he just told me to go back to bed.
Now, if she's getting bites, you may have bed bugs.
~C.