Something is definitely bothering her. Did you have blood work done too? Is she just peeing without moving or getting up to squat and go? Also what is the color of the pee? We went through this with one of our Chihuahua's and the vet we were using at the time missed the problem causing it to get worse. She had a sever thyroid problem and she is now diabetic and blind but with great care from her new vet she is 12 yrs old and still going strong.