We managed to get her into her car seat, but it was difficult to buckle her, since she was defiant in keeping her knees at her chest. About 5 minutes into the ride to our pediatrician's office, she became very quiet, slowly relaxing her knees down into the seat. By the time we arrived, we realized that she again just released everything in her bladder at once, soaking her pants and her seat in the process. We had a change of clothes, so we were prepared. At this point, after pasting together everything that had happened thus far and after talking to Tisha (our dear friend, who happens to be an RN) we figured we were probably dealing with a UTI. Mira has never had a urinary tract infection up to this point, for that matter, I don't think she has ever had an ear infection.
Ironically, by the time we checked in at the office, got Mira changed in one of the exam rooms, and finished giving a download to the nurse, Mira was worn out and simply relaxing in her chair like it was just another day. They did a catheter to draw some urine, which came back normal, except for the fact she had a low white blood cell count. However, her urine smelled incredibly foul - this could be due to her holding it in for so long, but it could also be attributed to something else. As a precaution, they gave us a prescription for an antibiotic and the office is going to run some cultures on her urine, so see if there is something there. We have no idea why she has been holding to go to the bathroom and then releasing everything at once - it could be related to a UTI, but we aren't sure at this point. They are supposed to get us lab results in the next 48 hours, but in the meantime, Mira is going to start the antibiotics.