Hi Krista,
I did call our local 24 hour emergency hospital and they said to monitor her for any signs of severe lethargy since her appointment yesterday she has seemed fine.. but when I got back home I noticed that she was not normal and was not sitting or using her back legs properly.
Will continue to monitor her until tomorrows appointment. Do you think it could be because she is in pain?
Has he tried using the bathroom by going in the litter box but nothing is coming out?
I would say that if it has been a while since he has used the bathroom, your best bet is to consult a vet. If he has tried but failed to use the bathroom, there could be some sort of blockage preventing them from using the bathroom. I know with one of my 9 year old cats, he wasn’t able to use the bathroom, and after a bit he would scream in pain when trying. Turned out that he had crystalized urine, very painful but easily treatable with some antibiotics. But even if he doesn’t seem to be trying to use the restroom, it would still be a good idea to consult a vet if it has been a few days simply because if he is drinking and eating normally, it needs to eventually come back out. Better to check early and be all good than to be too late to do anything.