Could the dentist be the one who fractured my tooth?

I went to the dentist recently with a few fillings, one of them being my molar #15 (the very back top left tooth). I had no pain before the fillings. Now, after the fillings, that tooth cannot be touched without excruciating pain. I went back because they thought it was a bite issue, but sure enough, they believe my tooth is fractured and that I need a crown. I know that you can't always see fractures in teeth on x-rays from beforehand, but is it possible that she did it while drilling, and is there any way to prove it?