Cat hasn’t gone to bathroom since morning?

Pr

Hey ladies, I adopted a cat about a month ago and today I noticed that she hasn’t used her litter box all day (like 9am - currently 7pm) this has me a little concerned and I was wondering at what point do I need to take her to the vet? She’s acting normal, still eating and drinking water like normal, and as far as I can tell she hasn’t peed or pooped somewhere in the house that’s not her littler box