I went to my new dentist today to have a filling replaced and I am totally freaked out. She told me she was numbing the area, and although the needle hurt more than it has when I have had cavities filled before, I still assumed it was ok. I then lost sensation in my cheek, and it moved up to my right eye and and forehead. It felt like I was touching someone else's face...I had no feeling on the right side. I told her it was making me nervous, and asked if this was normal. She looked at me oddly, asked if I was feeling any heart palpitations, and then reassured me that it would wear off. After she was finished, I told her I have never experienced this before, and she said I've probably only had local, and that this was a "nerve block". She also mentioned the trigeminal nerve, and said obviously I am very sensitive and she would make a note not to use a nerve block on me again. How common is it for this to happen??