I made a mistake in work and panicking. I’ve been in the job just over a year. My boss told me it’s nothing to worry about but wants me to reflect on it. He appears to be very happy with my work otherwise and I’ve got a lot of feedback. I hate making mistakes and therefore always go above and beyond what my job role is so I do everything right. I’m paranoid I will end up getting dismissed even though the mistake wasn’t that bad. Why am I over thinking this?