I am sorry to hear that Chloe is suddenly very sleepy and not eating and drinking tonight after being vaccinated and being treated for worms this morning.
It is pretty common to have some muscle soreness and feel a bit stiff for 48-72 hours after vaccines, particularly Rabies or Feline Leukemia vaccines. Some cats will even run a low grade fever. This isn't an allergic reaction, or necessarily a bad thing. It's evidence that her immune system is responding to the vaccines. People often have the same reaction after a vaccine. If you've ever had a sore arm after a Tetanus shot you know how she feels.
But it also isn't necessary for her to be uncomfortable.
If you know where the vaccines were given a warm compress on the injection sites may help ease soreness.
You can also call her veterinarian and ask for a few days of prescription nonsteroidal anti-inflammatory medication. Metacam or Onsior both work very well for this.
Getting her to move around and play a couple times a day will help relieve soreness too in the long run, but she may not feel up to that tonight, I would try this tomorrow.
In the future you might want to have only one vaccine given at a time (some cats seem to react more when multiple vaccines are given) and ask for a prescription of a nonsteroidal when she gets her vaccines so if she gets sore next time you have them available.
You might also want to wait a few days between worming medication and vaccines so as to not overwhelm her.
If she isn't eating and drinking she won't have much to eliminate. And her low grade fever and muscle soreness may make her just feel like sleeping. That's fine for tonight.
In the morning if she is reluctant to eat I recommend offering a bland diet of 2/3 boiled minced white skinless chicken and 1/3 boiled white rice mixed with some low salt chicken broth to increase palatability and fluid intake.
If she isn't perking back up tomorrow though some fluids and an injection to ease inflammation would be good.
Please let me know if you have any further questions.