I keep my beagle inside the house and I've noticed over the past couple of days that she hasn't been going to the bathroom like normal. I take her out at pretty regulated times (I live right next to my college campus so I can go home during breaks between classes) but she hasnt' been doing as much business.

I've had the dog less than a month but she was already house broken for the most part when I received her. That might be a factor?

Is this something to be worried about?

Edit: I forgot to say that her eating/drinking habits haven't changed as far as I can tell and she also isn't going anywhere inside the house. I haven't seen any and I can smell it anyway, I'm a bit of a neat freak.