Are dental hygienists allowed to drill your teeth?

Last week, my dentist put fillings in my teeth. After getting home and the numbing wearing off, I realized that my bite was not right. I could not bite down on the teeth on the right side of my mouth. I called the office and got scheduled back in. When I went back in the dental hygienist, she took me back and started drilling on my teeth without the supervision of the dentist for 10 minutes. She kept having me bite down and asking me if it felt better. It did not. So, she said that she was going to go and get the dentist. When she returned back to the room, he was not with her. She said that he told her how to fix it. I did not see the dentist at all during my visit. My teeth are still hurting.