There have been so many replies already that I almost feel like passing this one up but here goes.
You say the chiro says: "No real problems. Three weeks in my care and you'll be fine...."
Funny.... I remember hearing the same thing when i herniated 2 of my discs. Most chiropractors are fucking witch doctors. I lived in Atlanta, GA which holds Life Chiropractic college, one of 2 biggest Chiro schools in the nation. 90% of these people are fucking idiots. They would never get into a real college let alone a medical school. Now, some chiros are cool and I believe can 'supplement' training, BUT they are not doctors and x-rays do not show herniated discs.!!!!!
Re-read that last statement to yourself.
Please get your opinion from a real ortho like you plan and maybe stay away from the chiro that says he will have you all fixed up in 3 weeks.
And fuck him when he says good mornings are the worst thing you can do for your lower back. That is bullshit!!!!!!! What qualifies him to make this statement??? Do you really think research has done that shows good mornings blow out lower backs??? Same old tired argument that squatting will ruin your knees. Do you realize there are tons of ways you can perform good mornings, all of which work your body differently? Did he bother to ask you how you were doing them?
Sorry to beat on you. You will be fine eventually. Get a real opinion, stay away from witch doctors, and learn that injuries are part of the sport.
take care.
/irish