I think scarlett sounds a little young for a stroke too, but it is good to take her to get checked out. About forgetting her water, don't beat yourself up over it. Our water dish gets empty every once in a while, and Kito kindly reminds me that he needs some.
We know how much you love scarlett, and I hope everything is ok. Please let us know what the vet says.
Hugs to you and scarlett.