Perfect. Thanks so much for the extra information Sherrie. I really appreciate it.
It sounds to me like they checked TNT's anal glands and rectum, and it sounds to me like this might be an issue called perianal fistula. This can happen when a dog pushes too hard to get out a constipated fecal material, and this causes injury to the rectum that can take months (to years) to heal because it's in such a highly used part of the body. Additionally, certain breeds are more prone to these fistulas, and german shepherds are at the top of that list.
There's more information on them here:
Of course, it's hard to know if this is exactly what TNT has going on since I can't see her, but in my experience, it's one of those problems that can be hard to figure out, especially if the area is already healing and my not be as obvious as some other problems.
If TNT were my girl, I'd give the vet a call and ask if they think this could be what is going on with her.
There's a great site that goes over treatment options here: http://www.veterinarypartner.com/Content.plx?A=3061&S=2&EVetID=286586
I hope thi shelps.