My cat of 5 yrs has suddenly decided to stop using her litter box. She has replaced it with my daughters room!

My daughters room had all new carpet, so no previous animals have soiled it. The cat prefers to go under my girl's bed, so we moved the bed and shampooed the carpets. The cat is continuing to go under her bed, even though it is moved and carpets are clean!

I need some helpful suggestions here! I don't want to get rid of my cat, but I don't want stinky carpet either, HELP??

I have been told that when a cat suddenly changes its habits like that it may have an infection. Have you had him/her checked?

I am planning to take her to the vet, just haven't had time yet. I guess I need to make time.

Thanks!