Thank you to all of those who have replied in concern! You are possibly the most sweetest of anyone. I phoned the vet and they told me to bring her in, so I had a friend take her to the vet because I had to go to work. Autumn is okay, they don't know for sure what it is... they listed numerous possibilities of what it could be, some of which were eating foods she shouldn't have (such as table scraps), parasites, food allergies. The most possible element is the table scrap. They gave her some liquid medicine to be fed orally, and also pills that are to be taken. She is not allowed to eat or drink anymore tonight, she can drink a little bit tomorrow in the morning, though. But she should be fine.
This is a wonderful relief to me. And again, thank you ALL for being so kind and caring. Thank you so much