Sick after vaccinations

Question
I took my 16-month-old cat, Pusia, for her yearly vaccinations a few days ago. The "Luv My Pet" organization sponsors this event every week there. The doctor gave her shots for rabies, 4-in-1 FVRCP, and the FeLV. I often took my other cats there to get those same shots and their side effects have never lasted for more than a day. Its been three and a half days since I took Pusia, and she still seems sick. She hasn't left the house at all, she sleeps all the time and her breathing became very deep and strained. She eats and drinks, although very little and only when you give it to her; she wont go to the food bowl herself. Should I wait until it goes away or take her to a Veterinarian?

Answer
You need to get this cat to the vets right away. I wouldn't wait one more day. She is having a severe reaction to these vaccinations or she has had her immune system lowered and has picked up something else.
24 hours is the longest any reaction should be if they have one.

In  any regard, she needs to see a vet now.