Not sure why you feel the need to emphasize things with caps, but obviously, if you have not found that your cat has passed the dryer sheet in her feces (and you should be checking), then you need to take her to the vet. Not only are there toxic chemicals in the dryer sheets themselves, but they are fibrous and can lead to intestinal blockages. Think a hairball, but far more dense and compressed.
Just because your cat is great and dandy after eating one dryer sheet does not mean she will be great and dandy after the second, or the third, or the tenth. I would strongly suggest keeping your dryer sheets somewhere your cat cannot access them, since this has occurred before.
If she is ingesting used sheets, throw them away promptly after removing the laundry from the dryer. It will take you approximately 30 seconds, tops, and will prevent any chance of your cat dying of a bowel obstruction.