I had gone through composite filling on the right upper first molar. After filling its been almost three weeks.. But while brushing I feel tingling and a little pain.feels like the nerve gets bothered. When I rub my finger around the filling part I feel the tingling and mild pain. It's same pain when during drilling the tooth I felt when the doctor drilled little deeper. The cavity was deep. Is it the sign for root canal? During the session eight teeth went through filing all were upper and lower molars and out of which my lower right first molar was a rct. First picture us before filling of my teeth. Second is the rct of my tooth