Same thing happened to me as a teenager. I was told I had a cavity, dentist started drilling, there was an 'oops oh wait there's nothing here', he stopped then

Same thing happened to me as a teenager. I was told I had a cavity, dentist started drilling, there was an 'oops oh wait there's nothing here', he stopped then filled the hole he'd made. It's the only tooth I have that causes me problems. It's sensitive to hot and cold and I'm pretty sure the filling came out a long time ago. It's made me distrust dentists ever since.