Re: Possible pain from scar tissue?
Having some scar tissue after back surgery is pretty normal. The surgeon will be able to tell if there is too much that would warrant a problem. Since we all get scar tissue from back surgery the problem with another surgery to remove the scar tissue is the surgery itself will create even more scar tissue. But if you are having these problems you definitely want your surgeon to review the actual MRI films.
I had close to the same surgery and I know after the first week of p/t I was pretty sore, probably from laying around recooperating after surgery. I also got some leg pains, but didn't experience any sharp foot pains. If you had a good therapist and he knew your were recently post-op he should have started you off slowly and then depending on what you could handle, built you up from there. Maybe he built you up to quick.
It doesn't sound like the therapy did something wrong as the MRI would have picked it up, but it's good that you stopped p/t until you saw the doctor. If your concerned thats always the right thing to do.
Goodluck and let us know how you're doing. Take care, Chris