Haha nice, I had something similar to this. I'm an accountant/auditor who has ADHD and doing that undiagnosed was a special kind of hell. I was lucky enough to work in a very reputable firm too and the good ones, when you complete your work, will carry out a formal, two-stage review process. They'll write out, on a separate sheet all the errors you made and you have to reply with how you fixed them. First by my line manager or department head and then by the partner who's client it was.

Essentially, I had to have multiple teams of professional auditors telling me, in explicit detail and fully evidenced, that I had a problem with errors of inattention for years before I finally realised that I might have a problem with errors or inattention.

Luckily, I respond particularly well to the medication and things are much better now.