It does sound like a stroke to me
Try adding a heat pad on low and keeping her warm and comfortable. Since she's not dehydrated you won't have to offer the formula. However, she will have trouble drinking. Try offering her bottle to her throughout the night, and if she's not drinking, you'll have to offer it yourself. It's the same method as above, syringe it into the side of the mouth. Try calling around and seeing if anyone can fit you in sooner, I had a hamster have a stroke late at night, and I waited just a little too long and unfortunately because of that, she didn't make it through the night. If you can't get her in, just try your best to keep her comfy. Hoping for you that she hangs on XX