Is it common to make catastrophic mistakes in your first career?

[DreamMachine]

I’ve been a pharmacy technician for about 2 months. I keep making really really bad mistakes. My pharmacist is starting to get really annoyed. But I work hard and try to keep laser focused.  I’m becoming really discouraged. Was wondering if anyone has had a same experience starting a new work. 

[Gabriel Antonio]

Some mistakes, especially if you're insecure, are part of the process. But catastrophic mistakes? I think not. 

[Pelin]

In my first year of teaching, the students just wouldn't shut up, and I used a bad word. I was teaching in a private school and this was totally unacceptable. Luckily, the students didn't turn me in. I would have got sacked and maybe have a disciplinary record.

In my second year, in another private school, I got constantly yelled at by the principal because she didn't think I was academically competent. I cried a lot, and was mildly depressed. This caused further insecurities and I was really doing a bad job teaching in the first two years of my career. 

In my third year, to the principal's surprise, I found a job as a lecturer at a uni. Things started to get better after that. 

I found that seniors and managers tend to pick up on newly graduates and make them feel really insecure about themselves. Most of them do it unconsciously but they do. Because we give in to their ideas about us, we believe we are what they think and we keep making mistakes. Don't get discouraged. Just keep doing what you're doing and know that it gets a little bit better each time.