Hi, my name is Michelle, and I have for the last 5 months have been experiencing pressure-urgency to urinate. I have kidney stones frequently, and have had a CT, but there is not stone. My labs are all fine as far as no UTI, i did have a little blood in the urine, but again no CT. Sometimes the pressure is o bad, I feel like I could get sick (vomit). The doctor gave me Oxybutnin, but it doesn't seem to be helping at all. What do you think it could be?