Should I worry about my cat not having a bowel movement after being spayed on Monday?

She’s peed, but she hasn’t pooped.

At first I thought it was the litter—the clinic said no clumping litter so I bought Yesterday’s News… she got in the box and appeared to be trying to eat it (she spit it back out though). So I worried she would do her business outside the box… and since she’s sequestered in my bedroom that means the bed. I sprinkled a layer of her regular litter over the new stuff and she peed.

She seems to be eating well, so I am a little concerned about not seeing one. I tend to be paranoid about my animals though, so I’m not sure if it’s premature or valid that I am worried.

I called the clinic… I can’t get through to anybody. And I can’t get a vet to give me any kind of advice without seeing her.