My boss told me to not be so reserved and quite. I already dislike this job so much

I started a new job at a dental office and I really don’t like it. I’ve only been there for 5 weeks.

The dentist is a nice guy but he’s arrogant and told me the other day that he can sense my “misery” there. Which shocked me as I try not to let it show but more often than not, I do leave in tears because I have a hard time learning to do everything there and do it correctly. Yes this job is stressful but it’s not a “ugh I don’t wanna work today” it’s more like having a nervous stomach and the feeling of absolute dread every single morning I walk through those doors. Is that normal to feel a month in a new job?

Not only that but apparently the dentist is expecting more of me personality wise.. I’m an introvert. Although I am chatty, I’m not loud. I’m soft spoken. Always have been. The dentist told me I needed to show my personality more and that I’m too quite. It actually kind of stung because I talk to everyone there. I thought I was doing well but because I don’t come in there singing and dancing I get told I’m too reserved and uptight. I used to get told I’m too quite in school years ago and I’ve made a conscience effort to be more outgoing and not be called quite. It’s always bothered me to be told that. I’ll say I have come along ways but when can I be accept for me and not be graded based on my personality? I just want to do the job and go home. I don’t need a second job of showing my true self somewhere I’m really struggling to enjoy being at.

Anyway, he told me to go home and think about if this is truly what I want to do or not because I don’t need my trainer to invest a lot of time in me if I’m going to bail soon. He’s right. I don’t know what to do. I just started. Have I not given it enough time? Is 5 weeks long enough to see if this is a right fit or not? Was that his way of saying he doesn’t want me there?