Did my dentist file too much after a filling replacement?

I received a filling replacement on my silver filling. After the dentist had replaced the filling with composite he asked if my right side (the side worked on) was higher. I said it was and he proceeded to file. After 3 times, the final adjustment, I thought he filed for longer than he needed to. Now my right side feel like it is not biting as well as the left side. I'm worried he filed more of my real teeth rather than the filling and feel this would affect me negatively.