Well I have the same problem and I have been tested for diabetes and I was told I was neg on that test... But I did have a hysterectomy and this has been a ongoing problem since..I am thirsty a lot too.. so I am lost on this one..
Diabetes can also cause frequent urination. Are you also thirsty a lot? It would be a good idea for you to get your blood sugar tested.
It sounds to me like the beginning stages of menopause.