Hjdred12, how is the kitten doing? Is it keeping down the Pedialyte/water mix? If so, keep up with the hydration tonight. DEFINITELY take the kitten to the vet tomorrow. Make sure the kitten’s kept comfortably warm (but not hot; definitely not chilled).
It could be the kitten’s not feeling well from the shot/s; it’s a somewhat common reaction. Your vet will be able to determine if the kitten is running a fever or showing more serious signs of illness, not related to the shots. The vet may be able to prescribe medication that improves appetite, if he or she thinks that will help the kitten recover.
You may have some success offering the kitten a tablespoon or two of room-temperature or slightly warmed baby food (turkey) or wet cat food, thinned with a teaspoon of Pedialyte. (Thinned to goopy, but not thinned to liquid.)
Please keep us posted on how the kitten’s doing! I hope it’s just a mild reaction to the shot/s, and not something more serious. Your kitten is definitely showing you the behavior of a kitten that doesn’t feel well.