Apparently misinformed

I went to the dentist today for a cleaning. Excited because I got off work about 3:30 and was going to have a nice afternoon, being able to get home plently early. I sat down in the chair and the girl said she was going to put something on my gums to start the numbing. I was like "What?!?!?!" I thought for sure I was just getting a cleaning when in all actual reality I had to have two cavities filled. So now I am in the process of de-numbing. Not the great afternoon I had hoped for. But at least I like my dentist. He's really nice. I like him a lot better than they guy I had in Illinois. I knew I had the cavities and I was a little confused as to why he wanted me to get the cleaning before getting the cavities filled. But they really weren't bothering me so I didn't care too much. And it sure cost a lot more than the cleaning would have. Oh well, what can ya do, huh? The only thing is that one of them was huge and he's a little worried that my nerve is going to die and I'll have to have a root canal. So I'll be praying that it doesn't die. Because I really don't want to pay for a root canal. And that's my life tonight.