The Trenbolone should be out of your system for sure by now, top end of heavy use will be about 6 months, tops.
Your hernia was big, did this happen at one time? Did they use a mesh to secure the tear? Just guessing, but did it happen during a 45 degree Leg Press? I have seen many a hernia happen here, with the visceral/abdominal pressure usually being phenominally high at the bottom of the movement. Your doc is right when he says that you will be out for 6 months, I wouldn't even attempt a movement that can create high interabdominal pressure (ie: leg press, squat) but I disagree with him on his statement that you will never lift like you did before, I have trained clients that have had hernia surgery and they have achieved new heights post-surgery.
The thing about the hernia attaching to your scrotal wall, I have a hard time believing that could be caused by the use of anabolics, this makes no sense. Was your hernia technically the Inguinal or Femoral or Scrotal? Also did he use a Cross-Stitching, Patch, or Keyhole (Laparoscopic) method for repairing your hernia?
Good luck on your recovery,
HARDCORE