So last night it occurred to me.. she sleeps better when the outside temperature is warmer. But this doesn't make sense cause I have a heater in her room and I keep it a nice temperature in there, and I adjust it as necessary for when it's cold enough for the house heater to be kicking on at night. And THERE'S the key. Just about every time I got up with her last night, the house heater was on. I think the heater kicking on is waking her up.
I'm gonna buy a radio today while I'm out and about and see if it helps tonight.