I am stressed!!

So last Friday I was in the staff room at my new job. I had my ipod on because I work better with music. anyways, so two teachers were in there and they started to talk about me. At first I thought that they probably didn't know who I was, but I had my name tag on and I also had papers on the table that said enrichment and extended (that is what I am in). They were not saying anything too bad, but they were saying that I better be good because the girl I replaced was so good and that their kids are having a hard time. It was just silly things, but I feel the pressure. The girl I am replacing is great so that is hard to come into an environment that is new and people are watching. I know I am a great teacher, but I am not like this girl at all. She is way more outgoing and I am a shy, quite person. Mary Beth, one of my old parents of my fave kids ever, told me yesterday that if anyone can do this I could. She said one of the things she loved about me was everyday I would have something to say about her child. Something they did or said. She also noticed that I did that with every child. She also said I have a way of sneaking up on people. Like she remembered when I started at Bright Horizons that I was just ok and soon after that I became this great teacher who she really trusted and believed I was giving her child a great start. I really appreciated that. The girl I replaced said I better be good because they cant afford to have people dis enroll from the afternoon program. That made me even more stressed and felt pressure. I know I can do, but it is also scary too.