Pain when dental filling scratched

[BouncingBella]

I had a filling replaced 6 weeks ago and ever since, I have pain when I bite down.

Scratching the filling with my nail in a specific spot also creates the same pain.
Initially, flossing around that tooth was also painful but that has disappeared.

I have returned to my Dentist to have it checked and adjusted which has provided no relief.
Any idea what is going on?

Thank you so much for your advice, opinion.

[BouncingBella]

Thank you so much for that information.  My dentist who is usually very careful and not rushed was for some reason a bit rough and in a hurry.
Your explanation is maybe the result of her working too fast.  

The filling is a rather large one on a molar and it is indeed a composite resin.

[scottma]

Scratching on the surface of filling evokes discomfort may be associated with inadequate curing of filling material, assuming the filling material is composite resin. Solution of your problem is redo the filling and more delicate bite adjustment.