I don't have any fast answers but Chewy hides when he smells smoke. When we cook bacon he is beisdes himself and would hide under the bed if he could get to one!

it took us cooking it a few times to understand what his problem was. Are you cooking anything that might set her off? Bacon or do you have a fire place or a wood burning stove?
Sadie is our scardy cat. She shakes when she gets upset about something. Watch over the next few times, I'll bet you can figure out what it is that is freakin her out!