CrazyChick,
There is an emergency condition called cauda equina where your nerves in the low back are being pinched that control your bladder and bowels. This is a very serious condition and if not fixed very soon by back surgery, can cause permanent nerve damage and potentially loss of bladder/bowel control.
If you are continuing to have urinary control issues, go to the emergency room at Abbott Northwestern hospital where they can call in some of the best spine surgeons around to help you. I'm not sure if this would be covered by your insurance or not, but find out and go there if at all possible. Regional hospitals often don't have the best spine surgeons available. You can get a copy of the MRI you had done on CD by going to the facility that did it and asking for it. Get this and bring it with you.
It's better that you have this checked out quickly than to risk permanent urinary/bowel control issues. If I were having urinary control issues along with the leg pain/nurabness/foot drop, I wouldn't be willing to wait 3 days as the risk is way to high. The worst they could do is fully evaluate you and send you home, but this would be way better than living the rest of your life in diapers. It's amazing how different doctors can look at the same information and come to very different conclusions and methoRAB of treatment.
Sometimes you need to be very assertive about your medical care. You're the one who have to live with your condition, not anyone else, and you need to make sure you're getting the right care in a timely fashion.
Best wishes, and keep us up to date!