I realy think you need to got it check witha doctor. I would take a mid stream morning sample with you when you go that way he can at least stick test it there and then. I am sorry but it doesn't sound normal at all to me. Hope you can get it sorted soon it can't be very nice for you.
The lack of feeling might be that they cut a nerve, and the darkness in the urine could be something totally different (if it gets the color of Coca-Cola, for example, it could be a sign of hepatitis). I would definitely go see the doc and explain what is going on.
I just had a c-section 2 weeks ago, and I don't think the challenges you are having should be happening. Please see a Dr. and get checked out. It's important to not ignore it. By the way...you are my hero walking an hour after surgery. I thought I did well walking 12 hours later. 1 hour after I was still pretty frozen. You are one determined lady!